update zh-Hans translation
update zh-Hans translation

Change-Id: I1fca09cb7f222bb018f866d192164b3ef5b26fd8
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/303900
Tested-by: Service Cloud Jenkins <9144042a601061f88f1e1d7a1753ea3e2972119d@instructure.com>

instructure/canvas-lms,instructure/canvas-lms,instructure/canvas-lms,instructure/canvas-lms,instructure/canvas-lms,instructure/canvas-lms,instructure/canvas-lms