Updated docs

Author: rennokki

docs/basic-usage/pusher.md

@@ -74,6 +74,7 @@ You may add additional apps in your `config/websockets.php` file.
         'capacity' => null,
         'enable_client_messages' => false,
         'enable_statistics' => true,
+        'allowed_origins' => [],
     ],
 ],
 ```