Rename cn to zh for language

resources/lang/zh/admin/user.php

@@ -0,0 +1,18 @@
+<?php
+/**
+ * Pterodactyl - Panel
+ * Copyright (c) 2015 - 2017 Dane Everitt <dane@daneeveritt.com>.
+ *
+ * This software is licensed under the terms of the MIT license.
+ * https://opensource.org/licenses/MIT
+ */
+
+return [
+    'exceptions' => [
+        'user_has_servers' => '无法删除一个拥有活动状态服务器的用户. 请在继续此操作前删除他的服务器',
+    ],
+    'notices' => [
+        'account_created' => '成功创建用户',
+        'account_updated' => '成功更新用户',
+    ],
+];