update zh-Hans translation
update zh-Hans translation

Change-Id: If00321250f93e0dbab92412f6debcbfb8a030b85

HotChalk/canvas-lms,fronteerio/canvas-lms,grahamb/canvas-lms,SwinburneOnline/canvas-lms,sfu/canvas-lms,djbender/canvas-lms,grahamb/canvas-lms,HotChalk/canvas-lms,sfu/canvas-lms,fronteerio/canvas-lms,SwinburneOnline/canvas-lms,fronteerio/canvas-lms,SwinburneOnline/canvas-lms,sfu/canvas-lms,SwinburneOnline/canvas-lms,venturehive/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,grahamb/canvas-lms,djbender/canvas-lms,djbender/canvas-lms,venturehive/canvas-lms,venturehive/canvas-lms,HotChalk/canvas-lms,djbender/canvas-lms,HotChalk/canvas-lms,grahamb/canvas-lms,fronteerio/canvas-lms,venturehive/canvas-lms,sfu/canvas-lms,grahamb/canvas-lms