Update code-of-conduct.md
Update code-of-conduct.md

Refer to kubernetes/community as authoritative source for code of conduct

andrewsykim/kops,gambol99/kops,chrislovecnm/kops,mad01/kops,chrislovecnm/kops,mad01/kops,gambol99/kops,andrewsykim/kops,robinpercy/kops,blakebarnett/kops,blakebarnett/kops,blakebarnett/kops,robinpercy/kops,chrislovecnm/kops,blakebarnett/kops,justinsb/kops,gambol99/kops,aledbf/kops,mad01/kops,gambol99/kops,tsupertramp/kops,chrislovecnm/kops,justinsb/kops,tsupertramp/kops,andrewsykim/kops,mad01/kops,tsupertramp/kops,aledbf/kops,kubernetes/kops,robinpercy/kops,kubernetes/kops,tsupertramp/kops,aledbf/kops,kubernetes/kops,justinsb/kops,andrewsykim/kops,robinpercy/kops,aledbf/kops