delete staging before creating new branch

.github/workflows/banner.yaml

@@ -51,7 +51,9 @@ jobs:
         run: |
           git fetch
           if git show-ref --verify --quiet refs/remotes/origin/staging; then
-            git branch -D staging
+            git checkout staging
+            git reset --hard origin/staging
+#            git branch -D staging
 #            git push origin --delete staging
           fi
           git checkout -b staging