test: temporarily use ubuntu-latest for fork testing

Author: darshit2308

.github/workflows/review-sync.yml

@@ -33,7 +33,7 @@ concurrency:
 
 jobs:
   sync:
-    runs-on: hl-sdk-py-lin-md
+    runs-on: ubuntu-latest
     env:
       DRY_RUN: ${{ inputs.dry_run || 'false' }}