update zh-Hans translation
update zh-Hans translation

Change-Id: I0b8b58d6d89655b6a13aafe38d1d61787154bb46
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/264643
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