Add note that ASGs change during upgrade from 1.2
Add note that ASGs change during upgrade from 1.2

Fix #286

leandrocr/kops,aledbf/kops,sp-borja-juncosa/kops,sp-borja-juncosa/kops,gambol99/kops,BradErz/kops,chrislovecnm/kops,reactiveops/kops,leandrocr/kops,MadDogTechnology/kops,ikropotov/kops,MadDogTechnology/kops,dacohen/kops,BradErz/kops,sethpollack/kops,chrislovecnm/kops,dacohen/kops,mad01/kops,sethpollack/kops,ikropotov/kops,kubernetes/kops,blakebarnett/kops,tsupertramp/kops,jnewland/kops,austinmoore-/kops,austinmoore-/kops,justinsb/kops,DualSpark/kops,andrewsykim/kops,blakebarnett/kops,MadDogTechnology/kops,mad01/kops,leandrocr/kops,reactiveops/kops,aledbf/kops,zytek/kops,aledbf/kops,blakebarnett/kops,robinpercy/kops,WillemMali/kops,luomiao/kops,mad01/kops,tsupertramp/kops,dacohen/kops,kubernetes/kops,jnewland/kops,zytek/kops,dacohen/kops,WillemMali/kops,justinsb/kops,ikropotov/kops,gambol99/kops,ikropotov/kops,mad01/kops,austinmoore-/kops,BradErz/kops,robinpercy/kops,reactiveops/kops,zytek/kops,leandrocr/kops,luomiao/kops,faraazkhan/kops,blakebarnett/kops,luomiao/kops,zytek/kops,WillemMali/kops,sp-borja-juncosa/kops,kris-nova/kops,kris-nova/kops,chrislovecnm/kops,pdh/kops,pdh/kops,MadDogTechnology/kops,WillemMali/kops,chrislovecnm/kops,DualSpark/kops,austinmoore-/kops,faraazkhan/kops,DualSpark/kops,andrewsykim/kops,andrewsykim/kops,justinsb/kops,robinpercy/kops,kris-nova/kops,faraazkhan/kops,faraazkhan/kops,BradErz/kops,sethpollack/kops,pdh/kops,sethpollack/kops,gambol99/kops,DualSpark/kops,kris-nova/kops,pdh/kops,aledbf/kops,gambol99/kops,robinpercy/kops,luomiao/kops,reactiveops/kops,jnewland/kops,andrewsykim/kops,tsupertramp/kops,kubernetes/kops,tsupertramp/kops,sp-borja-juncosa/kops