Add comment linking to PR #3029

Signed-off-by: Thiago Cruz <thiago@squareup.com>

Author: thiagohmcruz

buildbuddy.yaml

@@ -23,6 +23,9 @@ x_templates:
         USE_BAZEL_VERSION: 7.x
     - &bazel_head
       env:
+        # See https://github.com/MobileNativeFoundation/rules_xcodeproj/pull/3029
+        #
+        # Temporary change to make CI pass until the fix is in `last_green`
         USE_BAZEL_VERSION: dd2464a5933e0a5a6765024573832717b71989bf
 
     - &normal_resources