Fix LostController test

Signed-off-by: Côme Chilliet <come.chilliet@nextcloud.com>

Author: come-nc

tests/Core/Controller/LostControllerTest.php

@@ -24,6 +24,7 @@
 use OC\Authentication\TwoFactorAuth\Manager;
 use OC\Core\Controller\LostController;
 use OC\Mail\Message;
+use OC\Security\RateLimiting\Limiter;
 use OCP\AppFramework\Http\JSONResponse;
 use OCP\AppFramework\Http\TemplateResponse;
 use OCP\Defaults;