ci: fix auto-merge workflow flags and merge strategy

.github/workflows/dependabot-auto-merge.yml

@@ -14,20 +14,17 @@ jobs:
     steps:
       - uses: dependabot/fetch-metadata@v2
         id: meta
-      - name: Skip major updates
-        if: steps.meta.outputs.update-type == 'version-update:semver-major'
-        run: |
-          echo "Major update detected (${{ steps.meta.outputs.dependency-names }}), skipping auto-merge"
-          exit 0
+
       - name: Wait for CI to pass
         if: steps.meta.outputs.update-type != 'version-update:semver-major'
-        run: gh pr checks "$PR_URL" --watch --fail-on-pending
+        run: gh pr checks "$PR_URL" --watch --required
         env:
           PR_URL: ${{ github.event.pull_request.html_url }}
           GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
       - name: Auto-merge
         if: steps.meta.outputs.update-type != 'version-update:semver-major'
-        run: gh pr merge --auto --merge "$PR_URL"
+        run: gh pr merge --auto --squash "$PR_URL"
         env:
           PR_URL: ${{ github.event.pull_request.html_url }}
           GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}