update cy translation
update cy translation

Change-Id: I274ec1be0604de3f6011cedcccf9d2ecab1c9c47
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/233802
Tested-by: Service Cloud Jenkins <9144042a601061f88f1e1d7a1753ea3e2972119d@instructure.com>

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