chore: adjust workflow to run PR review

Author: Mingholy

.github/workflows/qwen-code-pr-review.yml

@@ -1,7 +1,7 @@
 name: 🧐 Qwen Pull Request Review
 
 on:
-  pull_request:
+  pull_request_target:
     types: [opened]
   pull_request_review_comment:
     types: [created]