extension_ci: Run tests on pushes to `main` (#44079)

This seems sensible to do - it already was the case prior but
indirectly, lets rather be explicit about this.

Release Notes:

- N/A

Co-authored-by: Agus Zubiaga <agus@zed.dev>
904d90bee7Finn Evers committed on 12/3/2025, 3:13:15 PM· committed by GitHubparent1e09cbf
4 files changedLine totals unavailable