update zh-Hans translation
update zh-Hans translation

Change-Id: I886132526a0d5462c6e76f9955d68a62389bfd53

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