apply rector rules: symfony **UP TO** 44

src/Bundle/ChillMainBundle/Templating/Events/DelegatedBlockRenderingEvent.php

@@ -30,7 +30,7 @@ use Symfony\Component\EventDispatcher\Event;
  * The keys are read-only: if you try to update the context using array access
  * (example, using `$event['context_key'] = $bar;`, an error will be thrown.
  */
-class DelegatedBlockRenderingEvent extends Event implements ArrayAccess
+class DelegatedBlockRenderingEvent extends \Symfony\Contracts\EventDispatcher\Event implements ArrayAccess
 {
     /**
      * The returned content of the event.