update zh-Hans translation
update zh-Hans translation

Change-Id: Ic27b0b511872ec0b49af45428b1fab134da0ab76
Reviewed-on: https://gerrit.instructure.com/210349
Tested-by: Jenkins

instructure/canvas-lms,djbender/canvas-lms,instructure/canvas-lms,sfu/canvas-lms,djbender/canvas-lms,djbender/canvas-lms,sfu/canvas-lms,instructure/canvas-lms,djbender/canvas-lms,sfu/canvas-lms,instructure/canvas-lms,instructure/canvas-lms,instructure/canvas-lms,sfu/canvas-lms,instructure/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,sfu/canvas-lms