message: chore(migrate-nodegroups): add link to tutorial for full instructions
diff: Creates an EKS cluster with node groups and a workload, and showcases how add an
  additional node group to use for workload migration with zero downtime.
  +
  +For step-by-step instructions, check out the [tutorial][tutorial-migrate-nodegroups].
  +
  +[tutorial-migrate-nodegroups]: http://www.pulumi.com/docs/reference/tutorials/kubernetes/tutorial-eks-migrate-nodegroups/
  