Update check-restricted-files.yaml

Author: ralfhandl

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

@@ -30,5 +30,5 @@ jobs:
           echo github.event.pull_request.head.sha=${{ github.event.pull_request.head.sha }}
           echo github.event.pull_request.head.ref=${{ github.event.pull_request.head.ref }}
           echo
-          echo Diff between head and base sha
-          git diff --name-only ${{ github.event.pull_request.head.sha }} ${{ github.event.pull_request.base.sha }} -- versions
+          echo Diff between ${{ github.event.pull_request.head.ref }} and ${{ github.event.pull_request.base.ref }}
+          git diff --exit-code --name-only ${{ github.event.pull_request.head.sha }} ${{ github.event.pull_request.base.sha }} -- schemas versions