update zh-Hans translation
update zh-Hans translation

Change-Id: I6150ba3fb7be395c1cdf94aaaf4e5ec1e3bdf7c4
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/273401
Tested-by: Service Cloud Jenkins <9144042a601061f88f1e1d7a1753ea3e2972119d@instructure.com>

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