clarify message for cli argument
clarify message for cli argument

kubernetes/kops,aledbf/kops,justinsb/kops,aledbf/kops,justinsb/kops,aledbf/kops,aledbf/kops,justinsb/kops,robinpercy/kops,blakebarnett/kops,blakebarnett/kops,gambol99/kops,blakebarnett/kops,gambol99/kops,robinpercy/kops,gambol99/kops,kubernetes/kops,kubernetes/kops,blakebarnett/kops,robinpercy/kops,gambol99/kops,robinpercy/kops