update codeigniter docs url, fixed extra space

Author: sammyskills

docs/customization.md

@@ -27,7 +27,7 @@ $routes->get('register', '\App\Controllers\Auth\RegisterController::registerView
 ## Custom Redirect URLs
 
 By default, a successful login or register attempt will all redirect to `/`, while a logout action
-will redirect to a [named route](https://codeigniter4.github.io/CodeIgniter4/incoming/routing.html#using-named-routes "See routing docs") `login` or a *URI path* `/login`. You can change the default URLs used within the  `Auth` config file:
+will redirect to a [named route](https://codeigniter.com/user_guide/incoming/routing.html#using-named-routes "See routing docs") `login` or a *URI path* `/login`. You can change the default URLs used within the `Auth` config file:
 
 ```php
 public array $redirects = [