Update documentation

Author: smnandre

src/TwigComponent/doc/index.rst

@@ -66,9 +66,10 @@ file to control the template directory for your components:
 ```
 # config/packages/twig_component.yaml
 twig_component:
+    anonymous_template_directory: 'components/'
     defaults:
-        # default component template directory
-        App\Twig\Components\: 'components/'
+        # Namespace & directory for components
+        App\Twig\Components: 'components/'
 ```
 
 Component Basics