Edit [`./jobs/generators/default.nix`](./jobs/generators/default.nix) and add a block for the new version of Kubernetes in `generate.k8s`. For example:
Now add the version in [`./modules/k8s.nix`](./modules/k8s.nix) under `options.kubernetes.version.type` as well as a new check in [`./flake.nix`](./flake.nix) (e.g., `tests-k8s-1_23`).