update zh-Hans translation
update zh-Hans translation

Change-Id: Ifcf42543b27736bbc4283f0c3ce5ec5f6713771e

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