Update profile name validation pattern. #8493
Update profile name validation pattern. #8493

- prevents some incompatible characters from making their way into
profile names and causing DNS/hostnames issues

warmchang/minikube,warmchang/minikube,dalehamel/minikube,kubernetes/minikube,kubernetes/minikube,dalehamel/minikube,kubernetes/minikube,warmchang/minikube,kubernetes/minikube,kubernetes/minikube,dalehamel/minikube,warmchang/minikube,kubernetes/minikube,warmchang/minikube,warmchang/minikube,kubernetes/minikube,warmchang/minikube