Normalize quotes in workflow branches list

Change double quotes to single quotes for the 'dev' branch entry in .github/workflows/sync-branches-from-upstream.yml to maintain consistent quoting style; no functional change.

Author: mercyblitz

.github/workflows/sync-branches-from-upstream.yml

@@ -14,7 +14,7 @@ name: Sync Branches from Upstream
 
 on:
   push:
-    branches: [ 'main' , "dev" , "dev-1.x" ]
+    branches: [ 'main' , 'dev' , 'dev-1.x' ]
   schedule:
     - cron: '*/5 * * * *'