update zh-Hans translation
update zh-Hans translation

Change-Id: Ia6df72fd9bd7e27d6843f94aa4213848a80311dc

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