update cy translation
update cy translation

Change-Id: Ic42594c23a1d6525de8323b2b5e5f4b8dd3940b1
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/300819
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