Bump pascalgn/automerge-action from v0.12.0 to v0.13.0 (#7255)

Bumps [pascalgn/automerge-action](https://github.com/pascalgn/automerge-action) from v0.12.0 to v0.13.0.
- [Release notes](https://github.com/pascalgn/automerge-action/releases)
- [Commits](pascalgn/automerge-action@v0.12.0...c6f2699)

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/automerge.yml

@@ -16,7 +16,7 @@ jobs:
         env:
           GITHUB_TOKEN: "${{ secrets.GITHUB_TOKEN }}"
       - name: Merge pull requests
-        uses: pascalgn/automerge-action@v0.12.0
+        uses: pascalgn/automerge-action@v0.13.0
         if: steps.waitforstatuschecks.outputs.status == 'success'
         env:
           MERGE_METHOD: "squash"