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

Localization authors:
- Alice S <songchengalice@gmail.com>

mozilla/thimble.mozilla.org,mozilla/thimble.mozilla.org,mozilla/thimble.mozilla.org,mozilla/thimble.mozilla.org