update zh-Hans translation
update zh-Hans translation

Change-Id: I3e26274947219fe06102780e80e8e8872d4f16c7
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/244111
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