chore(actions)(deps): bump pascalgn/automerge-action

Bumps [pascalgn/automerge-action](https://github.com/pascalgn/automerge-action) from 0.15.6 to 0.16.4.
- [Release notes](https://github.com/pascalgn/automerge-action/releases)
- [Commits](pascalgn/automerge-action@v0.15.6...v0.16.4)

---
updated-dependencies:
- dependency-name: pascalgn/automerge-action
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/pr-automation.yml

@@ -50,7 +50,7 @@ jobs:
       !github.event.pull_request.draft
     steps:
       - name: Auto-merge Pull Request
-        uses: pascalgn/automerge-action@v0.15.6
+        uses: pascalgn/automerge-action@v0.16.4
         env:
           GITHUB_TOKEN: "${{ secrets.GITHUB_TOKEN }}"
           MERGE_METHOD: "squash"