Updated registry-creds docs with configure command
Updated registry-creds docs with configure command

dalehamel/minikube,r2d4/minikube,dalehamel/minikube,aaron-prindle/minikube,aaron-prindle/minikube,dalehamel/minikube,kubernetes/minikube,dlorenc/minikube,skipjaq/minikube,kubernetes/minikube,dlorenc/minikube,warmchang/minikube,skipjaq/minikube,mikegrass/minikube,dlorenc/minikube,dlorenc/minikube,warmchang/minikube,abbytiz/minikube,mikegrass/minikube,dims/minikube,kubernetes/minikube,dlorenc/minikube,dims/minikube,abbytiz/minikube,cu12/minikube,aaron-prindle/minikube,warmchang/minikube,cu12/minikube,skipjaq/minikube,r2d4/minikube,kubernetes/minikube,abbytiz/minikube,warmchang/minikube,warmchang/minikube,mikegrass/minikube,cu12/minikube,warmchang/minikube,dims/minikube,dlorenc/minikube,r2d4/minikube,warmchang/minikube,kubernetes/minikube,dlorenc/minikube,dlorenc/minikube,kubernetes/minikube,kubernetes/minikube