[meta]: Bump hmarr/auto-approve-action from 2 to 4

Bumps [hmarr/auto-approve-action](https://github.com/hmarr/auto-approve-action) from 2 to 4.
- [Release notes](https://github.com/hmarr/auto-approve-action/releases)
- [Commits](hmarr/auto-approve-action@v2...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/auto-approve.yml

@@ -8,7 +8,7 @@ jobs:
   auto-approve:
     runs-on: ubuntu-latest
     steps:
-    - uses: hmarr/auto-approve-action@v2
+    - uses: hmarr/auto-approve-action@v4
       if: ${{ github.actor == 'dependabot[bot]' || github.actor == 'pre-commit-ci[bot]' || github.actor == 'github-actions[bot]' }}
       with:
         github-token: "${{ secrets.REVIEW_TOKEN }}"