update zh-Hans translation
update zh-Hans translation

Change-Id: I5a34d68b6893b21dc5a2d95559d75e77b54a6d12
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/280709
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