update zh-Hans translation
update zh-Hans translation

Change-Id: Ib8827909658bdbab206736625da5bc24a545845e
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/301836
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