build(deps): bump stefanzweifel/git-auto-commit-action from 4 to 5

Bumps [stefanzweifel/git-auto-commit-action](https://github.com/stefanzweifel/git-auto-commit-action) from 4 to 5.
- [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@v4...v5)

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

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/cache-bust.yml

@@ -32,6 +32,6 @@ jobs:
       run: date --utc --rfc-email > .cache-buster
     -
       name: Push code
-      uses: stefanzweifel/git-auto-commit-action@v4
+      uses: stefanzweifel/git-auto-commit-action@v5
       with:
         commit_message: Monthly build