fix: Use the Extension class of symfony/dependency-injection instead …

…of symfony/http-kernel as it was made internal with Symfony 7.1 (#306)

Co-authored-by: Max Müller <[email protected]>

DependencyInjection/LiipMonitorExtension.php

@@ -7,8 +7,8 @@
 use Symfony\Component\Config\FileLocator;
 use Symfony\Component\DependencyInjection\Compiler\CompilerPassInterface;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\DependencyInjection\Extension\Extension;
 use Symfony\Component\DependencyInjection\Loader;
-use Symfony\Component\HttpKernel\DependencyInjection\Extension;
 
 class LiipMonitorExtension extends Extension implements CompilerPassInterface
 {