Try to fix docs workflow

Author: gonzalocasas

.github/workflows/docs.yml

@@ -14,7 +14,8 @@ jobs:
     if: github.ref == 'refs/heads/main' || startsWith(github.ref, 'refs/tags/v') || (github.event_name == 'pull_request_review' && github.event.review.state == 'approved')
     runs-on: ubuntu-latest
     steps:
-      - uses: compas-dev/compas-actions.docs@v3
+      - uses: compas-dev/compas-actions.docs@mkdocs
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
           doc_url: https://compas.dev/compas_xr
+          extras: mkdocs