Update check-restricted-files.yaml

Author: ralfhandl

.github/workflows/check-restricted-files.yaml

@@ -15,6 +15,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v5 # checkout repo content
+        with:
+          fetch-depth: 0
 
       - name: Check changed files
         shell: bash