Lab 4.4.3 correction

dnx

Pretty minor, but in the lab it is said

Run the kube-bench command and pass the name of the node to check, in our example the node name is master, your node name may be different.

However the argument 'master' or 'node' do not reflect the node name, but the benchmark to run:

Available Commands:
  help        Help about any command
  master      Run Kubernetes benchmark checks from the master.yaml file.
  node        Run Kubernetes benchmark checks from the node.yaml file.
  run         Run tests
  version     Shows the version of kube-bench.