update zh-Hans translation
update zh-Hans translation

Change-Id: Ibf31d001a9d5a1894b5daa014fbe0fd414db6e63
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/224478
Tested-by: Service Cloud Jenkins <9144042a601061f88f1e1d7a1753ea3e2972119d@instructure.com>

djbender/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,djbender/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,djbender/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,djbender/canvas-lms