Add a Repo check to all Workflows (#4339)

.github/workflows/delete-json-branch.yml

@@ -9,6 +9,7 @@ on:
 
 jobs:
   delete_branch:
+    if: github.repository == 'community-scripts/ProxmoxVE'
     runs-on: runner-cluster-htl-set
     steps:
       - name: Checkout the code
@@ -25,4 +26,4 @@ jobs:
             git push origin --delete "$PR_BRANCH"
           else
             echo "Skipping deletion of the main branch"
-          fi
+          fi