ci: Prevent "Tests Pass" job from running on forks (#31778)
Example fork [actions run](https://github.com/alphaArgon/zed/actions/runs/15349715488/job/43194591563)
which would be suppressed in the future.
(Sorry @alphaArgon)
Release Notes:
- N/A
a78563b80bPeter Tripp committed on 5/30/2025, 8:09:22 PM· committed by GitHubparentf881cac