Add comment to periodic CI pipeline to update release process doc when updating test suites (#22037)
Add comment to periodic CI pipeline to update release process doc when updating test suites (#22037)

This PR adds a comment to build_pipeline.py reminding anyone who makes changes to the test suites to also update the release process doc if necessary.

This is an action item from the Ray 1.10.0 release retrospective.
ray-project/ray,ray-project/ray,ray-project/ray,ray-project/ray,ray-project/ray,ray-project/ray,ray-project/ray,ray-project/ray