suppression de quelques deprecated 2

src/Controller/PageController.php

@@ -40,7 +40,7 @@ class PageController extends AbstractController
             return $this->redirectToRoute('app_page_show', ['name' => $page->getName()]);
         }
 
-        return $this->renderForm('page/edit.html.twig', [
+        return $this->render('page/edit.html.twig', [
             'title' => $page->getName(),
             'form'  => $form
         ]);