Change pull_request to pull_request_target in workflow

.github/workflows/ai-gdd-review.yml

@@ -1,7 +1,7 @@
 name: AI Game Design Review
 
 on:
-  pull_request:
+  pull_request_target:
     types: [opened, synchronize, reopened]
 
 jobs:
@@ -9,10 +9,10 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - name: Get complete history
+      - name: Checkout PR code
         uses: actions/checkout@v3
         with:
-          fetch-depth: 0
+          ref: ${{ github.event.pull_request.head.sha }}
       
       - name: Get diff
         run: |