🎨 fix extension deprecation

Author: garak

src/DependencyInjection/BeelabRecaptcha2Extension.php

@@ -4,8 +4,8 @@
 
 use Symfony\Component\Config\FileLocator;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\DependencyInjection\Extension\Extension;
 use Symfony\Component\DependencyInjection\Loader;
-use Symfony\Component\HttpKernel\DependencyInjection\Extension;
 use ReCaptcha\RequestMethod\CurlPost;
 use ReCaptcha\RequestMethod\Post;