(fix): Change on trigger event to pull_request_target in the "Check…

… config and readme updates / Ensure generated files are included (pull_request)" action to fix "Resource not accessible by integration" error while running the action (#1296)

Signed-off-by: AJAY JAGANATHAN <ajaganat@redhat.com>

.github/workflows/check-file-updates.yaml

@@ -1,6 +1,6 @@
 name: Check config and readme updates
 on:
-  pull_request:
+  pull_request_target:
 jobs:
   file-updates:
     permissions:
@@ -9,6 +9,9 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
+        with:
+          ref: ${{github.event.pull_request.head.ref}}
+          repository: ${{github.event.pull_request.head.repo.full_name}}
       - name: Generate files
         id: generate-files
         run: |