Update readme with migration
Update readme with migration

adamleff/knife-vsphere,mheidenr/knife-vsphere,swalberg/knife-vsphere,rhadoo/knife-vsphere,CoreMedia/knife-vsphere,MI-LA01/knife-ovh-cloud,DennisBP/knife-vsphere,dpattmann/knife-vsphere,tim95030/knife-vsphere,ezrapagel/knife-vsphere,swalberg/knife-vsphere,hbombonato/knife-vsphere,tcicone/knife-vsphere,chef-partners/knife-vsphere