Another fix for survey-on-merged-pr.yml (#5919)

Author: svrnm

.github/workflows/survey-on-merged-pr.yml

@@ -1,7 +1,7 @@
 name: Survey on Merged PR by Non-Member
 
 on:
-  pull_request:
+  pull_request_target:
     types: [closed]
 
 env:
@@ -17,6 +17,7 @@ jobs:
       pull-requests: write
     if: github.event.pull_request.merged == true
     steps:
+      - uses: actions/checkout@v4
       - name: Check if user is a member of the org
         id: check-membership
         run: |