Help for 'kubeconfig save' is incomplete

[andrewsomething]

The help for 'kubeconfig save' just kind of trails off... We can do better.

$ doctl kubernetes cluster kubeconfig save -h

This command adds the credentials for the specified cluster to your local kubeconfig. After this, your kubectl installation can directly manage your

Usage:
  doctl kubernetes cluster kubeconfig save <cluster-id|cluster-name> [flags]

https://docs.digitalocean.com/reference/doctl/reference/kubernetes/cluster/kubeconfig/save/

doctl/commands/kubernetes.go

Lines 394 to 395 in 343c86e

	cmdSaveConfig := CmdBuilder(cmd, k8sCmdService.RunKubernetesKubeconfigSave, "save <cluster-id|cluster-name>", "Save a cluster's credentials to your local kubeconfig", `
	This command adds the credentials for the specified cluster to your local kubeconfig. After this, your kubectl installation can directly manage your

[danaelhe]

merged