[BUGFIX] Fix sg_seo check in Services.php

Configuration/Services.php

 <?php
+
 /***************************************************************
  *  Copyright notice
  *
@@ -27,10 +28,8 @@ use SGalinski\SgJobs\Event\Listener\ExcludeFromReferenceIndexListener;
 use SGalinski\SgJobs\Preview\PreviewRenderer;
 use SGalinski\SgJobs\Service\BackendService;
 use SGalinski\SgJobs\Service\SitemapService;
-use SGalinski\SgSeo\Events\AccessPageListEvent;
 use Symfony\Component\DependencyInjection\Loader\Configurator\ContainerConfigurator;
 use TYPO3\CMS\Core\DataHandling\Event\IsTableExcludedFromReferenceIndexEvent;
-use TYPO3\CMS\Core\Utility\ExtensionManagementUtility;
 
 return static function (ContainerConfigurator $containerConfigurator): void {
 	$services = $containerConfigurator->services();
@@ -44,11 +43,11 @@ return static function (ContainerConfigurator $containerConfigurator): void {
 	$services->set(BackendService::class)->public();
 	$services->set(PreviewRenderer::class)->public();
 
-	if (ExtensionManagementUtility::isLoaded('sg_seo')) {
+	if (class_exists('\SGalinski\SgSeo\Events\AccessPageListEvent')) {
 		$services->set(AccessPageListEventListener::class)
 			->tag('event.listener', [
 				'identifier' => 'accessPageListEvent',
-				'event' => AccessPageListEvent::class
+				'event' => 'SGalinski\SgSeo\Events\AccessPageListEvent'
 			]);
 	}