Fix typo to list all available resource types

[elacheche]

Like mentioned by the kubectl command output, we should use api-resources instead of get

$ kubectl get
You must specify the type of resource to get. Use "kubectl api-resources" for a complete list of supported resources.

error: Required resource not specified.
Use "kubectl explain " for a detailed description of that resource (e.g. kubectl explain pods).
See 'kubectl get -h' for help and examples.