prevent lock file changes

.github/workflows/lockfiles.yaml

@@ -1,6 +1,6 @@
 name: Check .lock files
 on:
-    pull_request: null
+    pull_request_target: null
     push:
         branches:
             - main
@@ -9,12 +9,6 @@ jobs:
         runs-on: ubuntu-latest
         name: Verify lock file integrity
         steps:
-
-            - name: Clone Kimai
-              uses: actions/checkout@v4
-              with:
-                  persist-credentials: false
-
             - name: Prevent file change
               uses: xalvarez/prevent-file-change-action@v3
               with: