update zh-Hans translation
update zh-Hans translation

Change-Id: Ic9e5ba9a1de05e769812b808a5d9e1080429fc4b
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/232911
Tested-by: Service Cloud Jenkins <9144042a601061f88f1e1d7a1753ea3e2972119d@instructure.com>

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