Update buildtools repo URL (#2813)

The buildtools repo is now under bazel-contrib.
diff --git a/buildkite/docker/debian10/Dockerfile b/buildkite/docker/debian10/Dockerfile
index 2429693..dfe76a9 100644
--- a/buildkite/docker/debian10/Dockerfile
+++ b/buildkite/docker/debian10/Dockerfile
@@ -88,7 +88,7 @@
     chmod 0755 /usr/local/bin/bazel
 
 # Buildifier
-RUN LATEST_BUILDIFIER=$(curl -sSI https://github.com/bazelbuild/buildtools/releases/latest | grep -i '^location: ' | sed 's|.*/||' | sed $'s/\r//') && \
-    curl -Lo /usr/local/bin/buildifier https://github.com/bazelbuild/buildtools/releases/download/${LATEST_BUILDIFIER}/buildifier-linux-${BUILDARCH} && \
+RUN LATEST_BUILDIFIER=$(curl -sSI https://github.com/bazel-contrib/buildtools/releases/latest | grep -i '^location: ' | sed 's|.*/||' | sed $'s/\r//') && \
+    curl -Lo /usr/local/bin/buildifier https://github.com/bazel-contrib/buildtools/releases/download/${LATEST_BUILDIFIER}/buildifier-linux-${BUILDARCH} && \
     chown root:root /usr/local/bin/buildifier && \
     chmod 0755 /usr/local/bin/buildifier
diff --git a/buildkite/docker/debian11/Dockerfile b/buildkite/docker/debian11/Dockerfile
index d7ca602..b39e0d3 100644
--- a/buildkite/docker/debian11/Dockerfile
+++ b/buildkite/docker/debian11/Dockerfile
@@ -82,7 +82,7 @@
     chmod 0755 /usr/local/bin/bazel
 
 # Buildifier
-RUN LATEST_BUILDIFIER=$(curl -sSI https://github.com/bazelbuild/buildtools/releases/latest | grep -i '^location: ' | sed 's|.*/||' | sed $'s/\r//') && \
-    curl -Lo /usr/local/bin/buildifier https://github.com/bazelbuild/buildtools/releases/download/${LATEST_BUILDIFIER}/buildifier-linux-${BUILDARCH} && \
+RUN LATEST_BUILDIFIER=$(curl -sSI https://github.com/bazel-contrib/buildtools/releases/latest | grep -i '^location: ' | sed 's|.*/||' | sed $'s/\r//') && \
+    curl -Lo /usr/local/bin/buildifier https://github.com/bazel-contrib/buildtools/releases/download/${LATEST_BUILDIFIER}/buildifier-linux-${BUILDARCH} && \
     chown root:root /usr/local/bin/buildifier && \
     chmod 0755 /usr/local/bin/buildifier
diff --git a/buildkite/docker/debian12/Dockerfile b/buildkite/docker/debian12/Dockerfile
index f38bcb8..12a2aa6 100644
--- a/buildkite/docker/debian12/Dockerfile
+++ b/buildkite/docker/debian12/Dockerfile
@@ -77,7 +77,7 @@
     chmod 0755 /usr/local/bin/bazel
 
 # Buildifier
-RUN LATEST_BUILDIFIER=$(curl -sSI https://github.com/bazelbuild/buildtools/releases/latest | grep -i '^location: ' | sed 's|.*/||' | sed $'s/\r//') && \
-    curl -Lo /usr/local/bin/buildifier https://github.com/bazelbuild/buildtools/releases/download/${LATEST_BUILDIFIER}/buildifier-linux-${TARGETARCH} && \
+RUN LATEST_BUILDIFIER=$(curl -sSI https://github.com/bazel-contrib/buildtools/releases/latest | grep -i '^location: ' | sed 's|.*/||' | sed $'s/\r//') && \
+    curl -Lo /usr/local/bin/buildifier https://github.com/bazel-contrib/buildtools/releases/download/${LATEST_BUILDIFIER}/buildifier-linux-${TARGETARCH} && \
     chown root:root /usr/local/bin/buildifier && \
     chmod 0755 /usr/local/bin/buildifier
diff --git a/buildkite/docker/debian13/Dockerfile b/buildkite/docker/debian13/Dockerfile
index ddaadf0..8f59d86 100644
--- a/buildkite/docker/debian13/Dockerfile
+++ b/buildkite/docker/debian13/Dockerfile
@@ -77,7 +77,7 @@
     chmod 0755 /usr/local/bin/bazel
 
 # Buildifier
-RUN LATEST_BUILDIFIER=$(curl -sSI https://github.com/bazelbuild/buildtools/releases/latest | grep -i '^location: ' | sed 's|.*/||' | sed $'s/\r//') && \
-    curl -Lo /usr/local/bin/buildifier https://github.com/bazelbuild/buildtools/releases/download/${LATEST_BUILDIFIER}/buildifier-linux-${TARGETARCH} && \
+RUN LATEST_BUILDIFIER=$(curl -sSI https://github.com/bazel-contrib/buildtools/releases/latest | grep -i '^location: ' | sed 's|.*/||' | sed $'s/\r//') && \
+    curl -Lo /usr/local/bin/buildifier https://github.com/bazel-contrib/buildtools/releases/download/${LATEST_BUILDIFIER}/buildifier-linux-${TARGETARCH} && \
     chown root:root /usr/local/bin/buildifier && \
     chmod 0755 /usr/local/bin/buildifier
diff --git a/buildkite/docker/fedora39/Dockerfile b/buildkite/docker/fedora39/Dockerfile
index cec1be4..0001765 100644
--- a/buildkite/docker/fedora39/Dockerfile
+++ b/buildkite/docker/fedora39/Dockerfile
@@ -60,8 +60,8 @@
     chmod 0755 /usr/local/bin/bazel
 
 # Buildifier
-RUN LATEST_BUILDIFIER=$(curl -sSI https://github.com/bazelbuild/buildtools/releases/latest | grep -i '^location: ' | sed 's|.*/||' | sed $'s/\r//') && \
-    curl -Lo /usr/local/bin/buildifier https://github.com/bazelbuild/buildtools/releases/download/${LATEST_BUILDIFIER}/buildifier-linux-${BUILDARCH} && \
+RUN LATEST_BUILDIFIER=$(curl -sSI https://github.com/bazel-contrib/buildtools/releases/latest | grep -i '^location: ' | sed 's|.*/||' | sed $'s/\r//') && \
+    curl -Lo /usr/local/bin/buildifier https://github.com/bazel-contrib/buildtools/releases/download/${LATEST_BUILDIFIER}/buildifier-linux-${BUILDARCH} && \
     chown root:root /usr/local/bin/buildifier && \
     chmod 0755 /usr/local/bin/buildifier
 
diff --git a/buildkite/docker/fedora40/Dockerfile b/buildkite/docker/fedora40/Dockerfile
index 15736e4..35444e4 100644
--- a/buildkite/docker/fedora40/Dockerfile
+++ b/buildkite/docker/fedora40/Dockerfile
@@ -60,7 +60,7 @@
     chmod 0755 /usr/local/bin/bazel
 
 # Buildifier
-RUN LATEST_BUILDIFIER=$(curl -sSI https://github.com/bazelbuild/buildtools/releases/latest | grep -i '^location: ' | sed 's|.*/||' | sed $'s/\r//') && \
-    curl -Lo /usr/local/bin/buildifier https://github.com/bazelbuild/buildtools/releases/download/${LATEST_BUILDIFIER}/buildifier-linux-${BUILDARCH} && \
+RUN LATEST_BUILDIFIER=$(curl -sSI https://github.com/bazel-contrib/buildtools/releases/latest | grep -i '^location: ' | sed 's|.*/||' | sed $'s/\r//') && \
+    curl -Lo /usr/local/bin/buildifier https://github.com/bazel-contrib/buildtools/releases/download/${LATEST_BUILDIFIER}/buildifier-linux-${BUILDARCH} && \
     chown root:root /usr/local/bin/buildifier && \
     chmod 0755 /usr/local/bin/buildifier
diff --git a/buildkite/docker/fedora43/Dockerfile b/buildkite/docker/fedora43/Dockerfile
index 5b81ee6..e70f4d5 100644
--- a/buildkite/docker/fedora43/Dockerfile
+++ b/buildkite/docker/fedora43/Dockerfile
@@ -61,7 +61,7 @@
     chmod 0755 /usr/local/bin/bazel
 
 # Buildifier
-RUN LATEST_BUILDIFIER=$(curl -sSI https://github.com/bazelbuild/buildtools/releases/latest | grep -i '^location: ' | sed 's|.*/||' | sed $'s/\r//') && \
-    curl -fLo /usr/local/bin/buildifier https://github.com/bazelbuild/buildtools/releases/download/${LATEST_BUILDIFIER}/buildifier-linux-${BUILDARCH} && \
+RUN LATEST_BUILDIFIER=$(curl -sSI https://github.com/bazel-contrib/buildtools/releases/latest | grep -i '^location: ' | sed 's|.*/||' | sed $'s/\r//') && \
+    curl -fLo /usr/local/bin/buildifier https://github.com/bazel-contrib/buildtools/releases/download/${LATEST_BUILDIFIER}/buildifier-linux-${BUILDARCH} && \
     chown root:root /usr/local/bin/buildifier && \
     chmod 0755 /usr/local/bin/buildifier
diff --git a/buildkite/docker/rockylinux8/Dockerfile b/buildkite/docker/rockylinux8/Dockerfile
index 556e3f5..7e8d89b 100644
--- a/buildkite/docker/rockylinux8/Dockerfile
+++ b/buildkite/docker/rockylinux8/Dockerfile
@@ -56,8 +56,8 @@
     chmod 0755 /usr/local/bin/bazel
 
 # Buildifier
-RUN LATEST_BUILDIFIER=$(curl -sSI https://github.com/bazelbuild/buildtools/releases/latest | grep -i '^location: ' | sed 's|.*/||' | sed $'s/\r//') && \
-    curl -Lo /usr/local/bin/buildifier https://github.com/bazelbuild/buildtools/releases/download/${LATEST_BUILDIFIER}/buildifier-linux-${TARGETARCH} && \
+RUN LATEST_BUILDIFIER=$(curl -sSI https://github.com/bazel-contrib/buildtools/releases/latest | grep -i '^location: ' | sed 's|.*/||' | sed $'s/\r//') && \
+    curl -Lo /usr/local/bin/buildifier https://github.com/bazel-contrib/buildtools/releases/download/${LATEST_BUILDIFIER}/buildifier-linux-${TARGETARCH} && \
     chown root:root /usr/local/bin/buildifier && \
     chmod 0755 /usr/local/bin/buildifier
 
diff --git a/buildkite/docker/ubuntu1604/Dockerfile b/buildkite/docker/ubuntu1604/Dockerfile
index db54909..403711f 100644
--- a/buildkite/docker/ubuntu1604/Dockerfile
+++ b/buildkite/docker/ubuntu1604/Dockerfile
@@ -101,7 +101,7 @@
     chmod 0755 /usr/local/bin/bazel
 
 # Buildifier
-RUN LATEST_BUILDIFIER=$(curl -sSI https://github.com/bazelbuild/buildtools/releases/latest | grep -i '^location: ' | sed 's|.*/||' | sed $'s/\r//') && \
-    curl -Lo /usr/local/bin/buildifier https://github.com/bazelbuild/buildtools/releases/download/${LATEST_BUILDIFIER}/buildifier-linux-${BUILDARCH} && \
+RUN LATEST_BUILDIFIER=$(curl -sSI https://github.com/bazel-contrib/buildtools/releases/latest | grep -i '^location: ' | sed 's|.*/||' | sed $'s/\r//') && \
+    curl -Lo /usr/local/bin/buildifier https://github.com/bazel-contrib/buildtools/releases/download/${LATEST_BUILDIFIER}/buildifier-linux-${BUILDARCH} && \
     chown root:root /usr/local/bin/buildifier && \
     chmod 0755 /usr/local/bin/buildifier
diff --git a/buildkite/docker/ubuntu1804/Dockerfile b/buildkite/docker/ubuntu1804/Dockerfile
index 922b75f..271227e 100644
--- a/buildkite/docker/ubuntu1804/Dockerfile
+++ b/buildkite/docker/ubuntu1804/Dockerfile
@@ -83,7 +83,7 @@
     chmod 0755 /usr/local/bin/bazel
 
 # Buildifier
-RUN LATEST_BUILDIFIER=$(curl -sSI https://github.com/bazelbuild/buildtools/releases/latest | grep -i '^location: ' | sed 's|.*/||' | sed $'s/\r//') && \
-    curl -Lo /usr/local/bin/buildifier https://github.com/bazelbuild/buildtools/releases/download/${LATEST_BUILDIFIER}/buildifier-linux-${BUILDARCH} && \
+RUN LATEST_BUILDIFIER=$(curl -sSI https://github.com/bazel-contrib/buildtools/releases/latest | grep -i '^location: ' | sed 's|.*/||' | sed $'s/\r//') && \
+    curl -Lo /usr/local/bin/buildifier https://github.com/bazel-contrib/buildtools/releases/download/${LATEST_BUILDIFIER}/buildifier-linux-${BUILDARCH} && \
     chown root:root /usr/local/bin/buildifier && \
     chmod 0755 /usr/local/bin/buildifier
diff --git a/buildkite/docker/ubuntu2004/Dockerfile b/buildkite/docker/ubuntu2004/Dockerfile
index 142ea1a..d9dcef8 100644
--- a/buildkite/docker/ubuntu2004/Dockerfile
+++ b/buildkite/docker/ubuntu2004/Dockerfile
@@ -97,8 +97,8 @@
     chmod 0755 /usr/local/bin/bazel
 
 # Buildifier
-RUN LATEST_BUILDIFIER=$(curl -sSI https://github.com/bazelbuild/buildtools/releases/latest | grep -i '^location: ' | sed 's|.*/||' | sed $'s/\r//') && \
-    curl -Lo /usr/local/bin/buildifier https://github.com/bazelbuild/buildtools/releases/download/${LATEST_BUILDIFIER}/buildifier-linux-${TARGETARCH} && \
+RUN LATEST_BUILDIFIER=$(curl -sSI https://github.com/bazel-contrib/buildtools/releases/latest | grep -i '^location: ' | sed 's|.*/||' | sed $'s/\r//') && \
+    curl -Lo /usr/local/bin/buildifier https://github.com/bazel-contrib/buildtools/releases/download/${LATEST_BUILDIFIER}/buildifier-linux-${TARGETARCH} && \
     chown root:root /usr/local/bin/buildifier && \
     chmod 0755 /usr/local/bin/buildifier
 
diff --git a/buildkite/docker/ubuntu2204/Dockerfile b/buildkite/docker/ubuntu2204/Dockerfile
index 1120633..94d735b 100644
--- a/buildkite/docker/ubuntu2204/Dockerfile
+++ b/buildkite/docker/ubuntu2204/Dockerfile
@@ -79,8 +79,8 @@
     chmod 0755 /usr/local/bin/bazel
 
 # Buildifier
-RUN LATEST_BUILDIFIER=$(curl -sSI https://github.com/bazelbuild/buildtools/releases/latest | grep -i '^location: ' | sed 's|.*/||' | sed $'s/\r//') && \
-    curl -Lo /usr/local/bin/buildifier https://github.com/bazelbuild/buildtools/releases/download/${LATEST_BUILDIFIER}/buildifier-linux-${TARGETARCH} && \
+RUN LATEST_BUILDIFIER=$(curl -sSI https://github.com/bazel-contrib/buildtools/releases/latest | grep -i '^location: ' | sed 's|.*/||' | sed $'s/\r//') && \
+    curl -Lo /usr/local/bin/buildifier https://github.com/bazel-contrib/buildtools/releases/download/${LATEST_BUILDIFIER}/buildifier-linux-${TARGETARCH} && \
     chown root:root /usr/local/bin/buildifier && \
     chmod 0755 /usr/local/bin/buildifier
 
diff --git a/buildkite/docker/ubuntu2404/Dockerfile b/buildkite/docker/ubuntu2404/Dockerfile
index d00d0f3..5d48c48 100644
--- a/buildkite/docker/ubuntu2404/Dockerfile
+++ b/buildkite/docker/ubuntu2404/Dockerfile
@@ -79,8 +79,8 @@
     chmod 0755 /usr/local/bin/bazel
 
 # Buildifier
-RUN LATEST_BUILDIFIER=$(curl -sSI https://github.com/bazelbuild/buildtools/releases/latest | grep -i '^location: ' | sed 's|.*/||' | sed $'s/\r//') && \
-    curl -Lo /usr/local/bin/buildifier https://github.com/bazelbuild/buildtools/releases/download/${LATEST_BUILDIFIER}/buildifier-linux-${TARGETARCH} && \
+RUN LATEST_BUILDIFIER=$(curl -sSI https://github.com/bazel-contrib/buildtools/releases/latest | grep -i '^location: ' | sed 's|.*/||' | sed $'s/\r//') && \
+    curl -Lo /usr/local/bin/buildifier https://github.com/bazel-contrib/buildtools/releases/download/${LATEST_BUILDIFIER}/buildifier-linux-${TARGETARCH} && \
     chown root:root /usr/local/bin/buildifier && \
     chmod 0755 /usr/local/bin/buildifier