minor #21920 [EventDispatcher] Fix example in event_dispatcher.rst (Mynyx)

This PR was submitted for the 7.3 branch but it was merged into the 7.4 branch instead.

Discussion
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[EventDispatcher] Fix example in event_dispatcher.rst

Injection of ``tokens`` was missing.

Commits
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f90bc9d Fix example in event_dispatcher.rst

Author: javiereguiluz

event_dispatcher.rst

@@ -561,6 +561,7 @@ event subscribers, you can learn more about :ref:`how to use them <events-subscr
     namespace App\EventSubscriber;
 
     use App\Controller\TokenAuthenticatedController;
+    use Symfony\Component\DependencyInjection\Attribute\Autowire;
     use Symfony\Component\EventDispatcher\EventSubscriberInterface;
     use Symfony\Component\HttpKernel\Event\ControllerEvent;
     use Symfony\Component\HttpKernel\Exception\AccessDeniedHttpException;
@@ -569,6 +570,7 @@ event subscribers, you can learn more about :ref:`how to use them <events-subscr
     class TokenSubscriber implements EventSubscriberInterface
     {
         public function __construct(
+            #[Autowire(param: 'tokens')]
             private array $tokens
         ) {
         }