Update minikube start docs (#2365)
Update minikube start docs (#2365)

* Update minikube start docs

* Clarify when to use the extra-config flag

* nit - the Minikube -> Minikube

jboyd01/service-catalog,jboyd01/service-catalog,jboyd01/service-catalog,jboyd01/service-catalog,jboyd01/service-catalog,jboyd01/service-catalog