help on mac permissons

src/lang/cn.rs

@@ -266,5 +266,7 @@ pub static ref T: std::collections::HashMap<&'static str, &'static str> =
         ("android_start_service_tip", "点击 [启动服务] 或打开 [屏幕录制] 权限开启手机屏幕共享服务。"),
         ("Account", "账号"),
         ("Quit", "退出"),
+        ("doc_mac_permission", "https://rustdesk.com/docs/zh-cn/manual/mac/#启用权限"),
+        ("Help", "帮助"),
     ].iter().cloned().collect();
 }