Cleans up a new GitHub Actions workflow. Before you mark this PR as ready for review, make sure that you have: - ~~[ ] Added a solid test coverage and/or screenshots from doing manual testing~~ - [x] Done a self-review taking into account security and performance aspects - ~~[ ] Aligned any UI changes with the [UI checklist](https://github.com/zed-industries/zed/blob/main/CONTRIBUTING.md#uiux-checklist)~~ Release Notes: - N/A