chore(deps): bump dawidd6/action-homebrew-bump-formula from 3 to 4

Bumps [dawidd6/action-homebrew-bump-formula](https://github.com/dawidd6/action-homebrew-bump-formula) from 3 to 4.
- [Release notes](https://github.com/dawidd6/action-homebrew-bump-formula/releases)
- [Commits](dawidd6/action-homebrew-bump-formula@v3...v4)

---
updated-dependencies:
- dependency-name: dawidd6/action-homebrew-bump-formula
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/autobump.yml

@@ -11,7 +11,7 @@ jobs:
     name: Bump Homebrew formula
     runs-on: ubuntu-latest
     steps:
-      - uses: dawidd6/action-homebrew-bump-formula@v3
+      - uses: dawidd6/action-homebrew-bump-formula@v4
         with:
           token: ${{ secrets.HOMEBREW_GITHUB_API_TOKEN }}
           tap: miles170/homebrew-emacs