Update src/TwigComponent/doc/index.rst

Co-authored-by: Matheo D. <32077734+WebMamba@users.noreply.github.com>

Author: smnandre

src/TwigComponent/doc/index.rst

@@ -859,7 +859,7 @@ We already have a generic ``Alert`` component, so let's re-use it:
 .. code-block:: html+twig
 
     {# templates/components/Alert.html.twig #}
-    <div {{ attributes.defaults({class: 'alert alert-'~ type}) }}">
+    <div {{ attributes.defaults({class: 'alert alert-'~type}) }}">
         {% block content %}{% endblock %}
     </div>