refactor: add @var

To explicitly indicate dependency

Author: kenjis

system/Security/Security.php

@@ -13,6 +13,7 @@
 
 use CodeIgniter\Cookie\Cookie;
 use CodeIgniter\HTTP\RequestInterface;
+use CodeIgniter\HTTP\Response;
 use CodeIgniter\Security\Exceptions\SecurityException;
 use CodeIgniter\Session\Session;
 use Config\App;
@@ -529,6 +530,7 @@ private function saveHashInCookie(): void
             ]
         );
 
+        /** @var Response $response */
         $response    = Services::response();
         $cookieStore = $response->getCookieStore();
         $cookieStore = $cookieStore->put($this->cookie);