chore: link buildkite/README.md (#2109)
Replace the root `README.md` with a symlink to `buildkite/README.md`
since all it contained was a link to it anyway.
diff --git a/README.md b/README.md
deleted file mode 100644
index 9c3a4a0..0000000
--- a/README.md
+++ /dev/null
@@ -1 +0,0 @@
-See https://github.com/bazelbuild/continuous-integration/blob/master/buildkite/README.md
diff --git a/README.md b/README.md
new file mode 120000
index 0000000..3c6ef8c
--- /dev/null
+++ b/README.md
@@ -0,0 +1 @@
+buildkite/README.md
\ No newline at end of file
