Fix workflow to target staging branch

- Change trigger branches from [main, week2] to [staging]
- Aligns with mentor feedback for Step 2 deployment strategy

Author: Divyansh013

.github/workflows/translation-sync.yml

@@ -2,11 +2,11 @@ name: Translation Sync Tracker
 
 on:
   push:
-    branches: [main, week2]
+    branches: [staging]
     paths:
       - 'src/content/examples/en/**'
   pull_request:
-    branches: [main, week2]
+    branches: [staging]
     paths:
       - 'src/content/examples/en/**'
   workflow_dispatch: