minor #1453 twig.rst Add missing trait method to doc (SpacePossum)

This PR was merged into the 1.3 branch.

Discussion
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twig.rst Add missing trait method to doc

Commits
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d6dc5b67 Update twig.rst

doc/providers/twig.rst

@@ -152,6 +152,12 @@ Traits
 
     return $app->render('index.html', ['name' => 'Fabien'], new StreamedResponse());
 
+* **renderView**: Renders a view with the given parameters and returns a string.
+
+.. code-block:: php
+
+    $content = $app->renderView('index.html', ['name' => 'Fabien']);
+
 Customization
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