update cy translation
update cy translation

Change-Id: I9848782d4530b1f56085fc415dfd102a88b7a969
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/234860
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