Update Jupytext Notebook url path (#6961)

* update Jupytext Notebook url path

* update widget name check

Author: RRosio

packages/docmanager-extension/src/index.ts

@@ -42,7 +42,7 @@ const opener: JupyterFrontEndPlugin<IDocumentWidgetOpener> = {
           let route = 'edit';
           if (
             (widgetName === 'default' && ext === '.ipynb') ||
-            widgetName === 'Notebook'
+            widgetName.includes('Notebook')
           ) {
             route = 'notebooks';
           }