fix: address php-cs-fixer coding style issues

Author: Fahl-Design

src/Command/EventsListenCommand.php

@@ -39,7 +39,7 @@ protected function execute(InputInterface $input, OutputInterface $output): int
             'stop',
         ];
 
-        $service->listenForEvents(function (ContainerEvent $event) use ($service, $actions, $io) {
+        $service->listenForEvents(function (ContainerEvent $event) use ($service, $actions, $io): void {
             $container = $this->containers[$event->Actor->ID] ?? null;
             $prefix    = '[event]';
             if ($container) {