Pontoon: Update Chinese (China) (zh-CN) localization of WebThings Gateway
Pontoon: Update Chinese (China) (zh-CN) localization of WebThings Gateway

Localization authors:
- passionforlife <eloli@foxmail.com>
- YFdyh000 <yfdyh000@gmail.com>

moziot/gateway,mozilla-iot/gateway,mozilla-iot/gateway,mozilla-iot/gateway,moziot/gateway,mozilla-iot/gateway,moziot/gateway,mozilla-iot/gateway