update github workflow

Author: stevehu

.github/workflows/master-to-sync.yml

@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           fetch-depth: 0 # Fetches all history for all branches
 
@@ -23,6 +23,11 @@ jobs:
 
       - name: Merge Master into Sync
         run: |
-          git checkout sync
-          git merge origin/master --no-edit
+          if git ls-remote --exit-code --heads origin sync >/dev/null 2>&1; then
+            git fetch origin sync
+            git checkout -B sync origin/sync
+            git merge origin/master --no-edit
+          else
+            git checkout -B sync origin/master
+          fi
           git push origin sync

.github/workflows/sync-auto-pr.yml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Create Pull Request
         env: