Update index.rst

Author: smnandre

src/LiveComponent/doc/index.rst

@@ -2257,7 +2257,7 @@ Or override the ``loadingContent`` block:
 
 .. code-block:: twig
 
-    {% component SomeHeavyComponent with { defer: true }) %}
+    {% component SomeHeavyComponent with { defer: true } %}
         {% block loadingContent %}Loading...{% endblock %}
     {% endcomponent %}