docs(php): add @return void on NowoUiKitExtension::load.

Author: HecFranco

src/DependencyInjection/NowoUiKitExtension.php

@@ -60,6 +60,8 @@ public function prepend(ContainerBuilder $container): void
 
     /**
      * @param array<int, array<string, mixed>> $configs
+     *
+     * @return void
      */
     public function load(array $configs, ContainerBuilder $container): void
     {