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] <support@github.com>

.github/workflows/auto-approve.yml

@@ -10,7 +10,7 @@ jobs:
     permissions:
       pull-requests: write
     steps:
-      - uses: hmarr/auto-approve-action@v3
+      - uses: hmarr/auto-approve-action@v4
         if: contains(github.event.pull_request.labels.*.name, 'semver-spec-patch') && github.actor == 'scalameta-bot'
         with:
           github-token: ${{secrets.GITHUB_TOKEN}}