Update latest docker version mentioned in docs
Update latest docker version mentioned in docs

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