minor edits to prereq
minor edits to prereq

wombat/kubernetes-aws-workshop,arun-gupta/kubernetes-aws-workshop,dalbhanj/kubernetes-aws-workshop,arun-gupta/kubernetes-aws-workshop,dalbhanj/kubernetes-aws-workshop,dalbhanj/kubernetes-aws-workshop,arun-gupta/kubernetes-aws-workshop,arun-gupta/kubernetes-aws-workshop,dalbhanj/kubernetes-aws-workshop