Update migration info in README for address params
Update migration info in README for address params

ihmccreery/puppetlabs-gce_compute,puppetlabs/puppetlabs-gce_compute,ihmccreery/puppetlabs-gce_compute,icg-puppet/puppetlabs-gce_compute,hunner/puppetlabs-gce_compute,icg-puppet/puppetlabs-gce_compute,hunner/puppetlabs-gce_compute,puppetlabs/puppetlabs-gce_compute