Bump hmarr/auto-approve-action from 2.0.0 to 4.0.0

Bumps [hmarr/auto-approve-action](https://github.com/hmarr/auto-approve-action) from 2.0.0 to 4.0.0.
- [Release notes](https://github.com/hmarr/auto-approve-action/releases)
- [Commits](hmarr/auto-approve-action@v2.0.0...v4.0.0)

---
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-merge-github-actions.yml

@@ -14,7 +14,7 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v2
       - name: Auto approve
-        uses: hmarr/auto-approve-action@v2.0.0
+        uses: hmarr/auto-approve-action@v4.0.0
         with:
           github-token: ${{ secrets.GH_TOKEN }}
       - name: Merge pull request