Fix compatibility to older symfony version

Author: alexander-schranz

src/DependencyInjection/EWZRecaptchaExtension.php

@@ -9,7 +9,6 @@
 use Symfony\Component\DependencyInjection\Loader;
 use Symfony\Component\DependencyInjection\Reference;
 use Symfony\Component\Form\FormBuilderInterface;
-use Symfony\Component\Form\FormFactoryInterface;
 use Symfony\Component\HttpKernel\DependencyInjection\Extension;
 
 /**
@@ -41,10 +40,10 @@ public function load(array $configs, ContainerBuilder $container)
 
         if (3 == $config['version']) {
             $container->register('ewz_recaptcha.form_builder_factory', EWZRecaptchaV3FormBuilderFactory::class)
-                ->addArgument(new Reference(FormFactoryInterface::class));
+                ->addArgument(new Reference('form.factory'));
         } else {
             $container->register('ewz_recaptcha.form_builder_factory', EWZRecaptchaV2FormBuilderFactory::class)
-                ->addArgument(new Reference(FormFactoryInterface::class));
+                ->addArgument(new Reference('form.factory'));
         }
 
         foreach ($config['service_definition'] as $serviceDefinition) {