Update voila/app.py

Co-authored-by: Duc Trung Le <[email protected]>

voila/app.py

@@ -358,6 +358,7 @@ def hook(req: tornado.web.RequestHandler,
             Should be of the form:
 
             def page_config_hook(
+                current_page_config: Dict[str, Any],
                 base_url: str,
                 settings: Dict[str, Any],
                 log: Logger,