Update static.yml

.github/workflows/static.yml

@@ -66,7 +66,12 @@ jobs:
           fi
 
           # Checkout or create gh-pages branch
-          git fetch origin gh-pages || git checkout --orphan gh-pages
+          if git ls-remote --exit-code --heads origin gh-pages; then
+            git fetch origin gh-pages
+            git checkout gh-pages
+          else
+            git checkout --orphan gh-pages
+          fi
           
           # Add all files
           git add .