VAPI for register_script_message_handler of webkitgtk-6.0 is wrong

https://bugs.webkit.org/show_bug.cgi?id=269358

Reviewed by Adrian Perez de Castro.

Too bad we don't get a warning when we typo the colon here.

* Source/WebKit/UIProcess/API/glib/WebKitUserContentManager.cpp:

Canonical link: https://commits.webkit.org/274653@main

Source/WebKit/UIProcess/API/glib/WebKitUserContentManager.cpp

@@ -478,7 +478,7 @@ void webkit_user_content_manager_unregister_script_message_handler(WebKitUserCon
  * webkit_user_content_manager_register_script_message_handler_with_reply:
  * @manager: A #WebKitUserContentManager
  * @name: Name of the script message channel
- * @world_name (nullable): the name of a #WebKitScriptWorld
+ * @world_name: (nullable): the name of a #WebKitScriptWorld
  *
  * Registers a new user script message handler in script world with name @world_name.
  *