test docs workflow triggers and blockers

.github/workflows/docs.yml

@@ -21,6 +21,7 @@ jobs:
         id: pub
         run: |
           git fetch && git checkout main
+          git diff --name-only ${{ github.event.before }} ${{ github.sha }}
           if git diff --name-only ${{ github.event.before }} ${{ github.sha }} | grep -q "lib/package.json"; then
             echo "file_changed=true" >> $GITHUB_ENV
           else