[doc] adding ->createView() in normal symfony controller

Sorry if i did something wrong since it s my first PR there.

If you don't add ->createView() in the render you ll get an error Cannot assign Symfony\Component\Form\Form to property xxxComponent::$formView of type ?Symfony\Component\Form\FormView

Author: bdujon

src/LiveComponent/doc/index.rst

@@ -1482,7 +1482,7 @@ this, create your controller like normal, including the submit logic::
 
             return $this->render('post/edit.html.twig', [
                 'post' => $post,
-                'form' => $form,
+                'form' => $form->createView(),
             ]);
         }
     }