Use Xcode 13.0 for Bazel.

PiperOrigin-RevId: 404863754
diff --git a/.bazelci/build_bazel_binaries.yml b/.bazelci/build_bazel_binaries.yml
index 4b3d7f4..17d49f0 100644
--- a/.bazelci/build_bazel_binaries.yml
+++ b/.bazelci/build_bazel_binaries.yml
@@ -22,7 +22,7 @@
       - "-c"
       - "opt"
   macos:
-    xcode_version: "12.4"
+    xcode_version: "13.0"
     build_targets:
       - "//src:bazel"
       - "//src:bazel_nojdk"
@@ -30,7 +30,7 @@
       - "-c"
       - "opt"
   macos_arm64:
-    xcode_version: "12.4"
+    xcode_version: "13.0"
     build_targets:
       - "//src:bazel"
       - "//src:bazel_nojdk"
diff --git a/.bazelci/postsubmit.yml b/.bazelci/postsubmit.yml
index 8f4d8a5..e865851 100644
--- a/.bazelci/postsubmit.yml
+++ b/.bazelci/postsubmit.yml
@@ -150,7 +150,7 @@
       - build
       - test
   macos:
-    xcode_version: "12.4"
+    xcode_version: "13.0"
     shell_commands:
       - sed -i.bak -e 's/^# android_sdk_repository/android_sdk_repository/' -e 's/^#
         android_ndk_repository/android_ndk_repository/' WORKSPACE
diff --git a/.bazelci/presubmit.yml b/.bazelci/presubmit.yml
index 7aede09..90e2bdd 100644
--- a/.bazelci/presubmit.yml
+++ b/.bazelci/presubmit.yml
@@ -141,7 +141,7 @@
       # Re-enable once fixed: https://github.com/bazelbuild/bazel/issues/8162
       - "-//src/java_tools/import_deps_checker/..."
   macos:
-    xcode_version: "12.4"
+    xcode_version: "13.0"
     shards: 5
     shell_commands:
       - sed -i.bak -e 's/^# android_sdk_repository/android_sdk_repository/' -e 's/^#