Bump hmarr/auto-approve-action from 3 to 4

Bumps [hmarr/auto-approve-action](https://github.com/hmarr/auto-approve-action) from 3 to 4.
- [Release notes](https://github.com/hmarr/auto-approve-action/releases)
- [Commits](hmarr/auto-approve-action@v3...v4)

---
updated-dependencies:
- dependency-name: hmarr/auto-approve-action
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/automerge.yml

@@ -22,6 +22,6 @@ jobs:
     if: github.event.pull_request.user.login == 'pre-commit-ci[bot]' || github.event.pull_request.user.login == 'dependabot[bot]'
 
     steps:
-    - uses: hmarr/auto-approve-action@v3
+    - uses: hmarr/auto-approve-action@v4
       with:
         github-token: ${{ secrets.PERSONAL_TOKEN }}