glooctl help text cleanup

[DaleBingham]

If you run this

glooctl create upstream kube --help

You get this below where permissions needs to be fixed. Again very, very small fix.

Kubernetes Upstreams represent a collection of endpoints for Services registered with Kubernetes. Typically, Gloo will automatically discover these upstreams, meaning you don't have to create them. However, if upstream discovery in Gloo is disabled, or RBAC pe0rmissions have not been granted to Gloo to read from the registry, Kubernetes services can be added to Gloo manually via the CLI.

[rickducott]

Hey, thanks for flagging this. We actually intended to archive this repo after publishing gloo 0.5.0, as the glooctl CLI is now built in that repo.

[rickducott]

Filed solo-io/gloo#203 to track