CI "Check for Safety" provide no actionable feedback.

[bcsgh]

What version of protobuf and what language are you using?

Current main branch

What operating system (Linux, Windows, ...) and version?

GitHub's CI

What runtime / compiler are you using (e.g., python version or gcc version)

Not relevent?

What did you do?
Steps to reproduce the behavior:

1. Create a random fork as a random contributor and do something in a new branch.
2. Create a draft merge request.
3. Look at the Action the merge requests kicks off
4. See This pull request is from an unsafe fork and hasn't been approved to run tests! without even a link to what to do about that.

What did you expect to see

A message that says what to do.

What did you see instead?

A non-actionable message. (It does at least say what's wrong, jut not what to do next.)

[googleberg]

@acozzette Can you see if this message is customizable?