update cy translation
update cy translation

Change-Id: I4cce67bb1880e2860b0169f6475f795cdfbbad90
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/258672
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