Use squash in automerge

Author: razor-x

.github/workflows/automerge.yml

@@ -44,7 +44,7 @@ jobs:
           PR_URL: ${{ github.event.pull_request.html_url }}
           GH_TOKEN: ${{ secrets.GH_TOKEN }}
       - name: Merge pull request
-        run: gh pr merge --auto --merge "$PR_URL"
+        run: gh pr merge --auto --squash "$PR_URL"
         env:
           PR_URL: ${{ github.event.pull_request.html_url }}
           GH_TOKEN: ${{ secrets.GH_TOKEN }}