Make a note of required versions for dependencies on test-network

Small issue I just ran into, the sample-network scripts use https://github.com/kubernetes/kubernetes/pull/105776 so kubectl must be at least v1.23.

```
error: unrecognized condition: "jsonpath={.status.type}=Deployed"
```
I was able to get past this by upgrading my kube-cli, but wanted to highlight that specific dependency versions here would be helpful.

Start by inspecting the test-network or sample-network scripts and their accompanying documentation to find where dependency requirements are recorded. Document that kubectl must be at least v1.23, along with any other required versions found there, and verify the guidance addresses the reported jsonpath error.

Written by the indexing model from the issue text.