update cy translation
update cy translation

Change-Id: Ib830e26072dab28da01be4f24d859fa5715ae1d6
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/297614
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