update cy translation
update cy translation

Change-Id: I7120c92ee7c0801b945b2722b81e61bda603ebc2
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/279898
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