Bump stefanzweifel/git-auto-commit-action from 3 to 4

Bumps [stefanzweifel/git-auto-commit-action](https://github.com/stefanzweifel/git-auto-commit-action) from 3 to 4.
- [Release notes](https://github.com/stefanzweifel/git-auto-commit-action/releases)
- [Changelog](https://github.com/stefanzweifel/git-auto-commit-action/blob/master/CHANGELOG.md)
- [Commits](stefanzweifel/git-auto-commit-action@v3...v4)

---
updated-dependencies:
- dependency-name: stefanzweifel/git-auto-commit-action
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/delete-preview.yaml

@@ -20,7 +20,7 @@ jobs:
         run: |
           rm -rf _preview/${{ github.event.pull_request.number }}
       - name: Commit the changes
-        uses: stefanzweifel/git-auto-commit-action@v3
+        uses: stefanzweifel/git-auto-commit-action@v4
         with:
           branch: gh-pages
           commit_message: Delete preview for pull request \#${{ github.event.pull_request.number }}