Update readme to support Laravel 11.md (#1621)

updated facade aliasing code as per Laravel 11 apps

readme.md

@@ -63,10 +63,14 @@ If you don't use auto-discovery, add the ServiceProvider to the providers list.
 Barryvdh\Debugbar\ServiceProvider::class,
 ```
 
-If you want to use the facade to log messages, add this to your facades in app.php:
+If you want to use the facade to log messages, add this within the `register` method of `app/Providers/AppServiceProvider.php` class:
 
 ```php
-'Debugbar' => Barryvdh\Debugbar\Facades\Debugbar::class,
+public function register(): void
+{
+    $loader = \Illuminate\Foundation\AliasLoader::getInstance();
+    $loader->alias('Debugbar', \Barryvdh\Debugbar\Facades\Debugbar::class);
+}
 ```
 
 The profiler is enabled by default, if you have APP_DEBUG=true. You can override that in the config (`debugbar.enabled`) or by setting `DEBUGBAR_ENABLED` in your `.env`. See more options in `config/debugbar.php`