update zh-Hans translation
update zh-Hans translation

Change-Id: I3c9f942d7bb22e4b55d4cfce864d1523a442694b

grahamb/canvas-lms,djbender/canvas-lms,sfu/canvas-lms,grahamb/canvas-lms,sfu/canvas-lms,venturehive/canvas-lms,SwinburneOnline/canvas-lms,HotChalk/canvas-lms,HotChalk/canvas-lms,djbender/canvas-lms,venturehive/canvas-lms,instructure/canvas-lms,instructure/canvas-lms,fronteerio/canvas-lms,dgynn/canvas-lms,dgynn/canvas-lms,venturehive/canvas-lms,matematikk-mooc/canvas-lms,grahamb/canvas-lms,matematikk-mooc/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,dgynn/canvas-lms,venturehive/canvas-lms,sfu/canvas-lms,instructure/canvas-lms,instructure/canvas-lms,djbender/canvas-lms,grahamb/canvas-lms,instructure/canvas-lms,SwinburneOnline/canvas-lms,grahamb/canvas-lms,matematikk-mooc/canvas-lms,HotChalk/canvas-lms,SwinburneOnline/canvas-lms,sfu/canvas-lms,fronteerio/canvas-lms,SwinburneOnline/canvas-lms,sfu/canvas-lms,fronteerio/canvas-lms,dgynn/canvas-lms,instructure/canvas-lms,instructure/canvas-lms,fronteerio/canvas-lms,djbender/canvas-lms,HotChalk/canvas-lms,matematikk-mooc/canvas-lms