fix dead link in docs (#6122)
fix dead link in docs (#6122)


meln1k/marathon,guenter/marathon,guenter/marathon,meln1k/marathon,meln1k/marathon,gsantovena/marathon,mesosphere/marathon,mesosphere/marathon,guenter/marathon,guenter/marathon,gsantovena/marathon,gsantovena/marathon,meln1k/marathon,mesosphere/marathon,meln1k/marathon,mesosphere/marathon,guenter/marathon,gsantovena/marathon,mesosphere/marathon,gsantovena/marathon