Fixed(ci): phpstan complaint

Error: Offset 'globalServicesEnabl…' on array{globalServicesEnabled: bool} on left side of ?? always exists and is not nullable.

src/Repository/ConfigurationRepository.php

@@ -61,7 +61,7 @@ final class ConfigurationRepository extends ServiceEntityRepository
 
     public function getServicesParameter(): bool
     {
-        /** @var array{configuration: array{ global: array{ globalServicesEnabled: bool }}} $config */
+        /** @var array{configuration: array{ global: array{ globalServicesEnabled: bool|null }}} $config */
         $config = $this
             ->createQueryBuilder('c')
             ->select('c.configuration')