update zh-Hans translation
update zh-Hans translation

Change-Id: Ib4d2d730fac8a3b397c665bb49a52dc4eb085031
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/302902
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