(typo) code missing bracket

docs/guide/runtime-sessions-cookies.md

@@ -278,7 +278,7 @@ $cookies = Yii::$app->response->cookies;
 $cookies->add(new \yii\web\Cookie([
     'name' => 'language',
     'value' => 'zh-CN',
-]);
+]));
 
 // remove a cookie
 $cookies->remove('language');