fix: use auto-merge for sync PR to respect approval requirement (#80)

Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: designcode

.github/workflows/sync-release-to-main.yaml

@@ -43,12 +43,12 @@ jobs:
               --body "Automated sync of release tags back to main."
           fi
 
-      - name: Auto-merge sync PR
+      - name: Enable auto-merge on sync PR
         if: steps.check.outputs.ahead != '0'
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         run: |
           PR=$(gh pr list --repo ${{ github.repository }} --base main --head release --state open --json number --jq '.[0].number')
           if [ -n "$PR" ]; then
-            gh pr merge "$PR" --repo ${{ github.repository }} --merge
+            gh pr merge "$PR" --repo ${{ github.repository }} --merge --auto
           fi