Update release instructions to be more clear
Update release instructions to be more clear

insequent/calico-docker,Metaswitch/calico-docker,Metaswitch/calico-docker,projectcalico/calico-containers,projectcalico/calico-containers,projectcalico/calico-docker,projectcalico/calico-docker,projectcalico/calico-containers,insequent/calico-docker