build(deps): 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

@@ -26,7 +26,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Autoapproving
-        uses: hmarr/auto-approve-action@v3
+        uses: hmarr/auto-approve-action@v4
         with:
           github-token: "${{ secrets.GITHUB_TOKEN }}"