make failed due to k8s version set to `1.28` in Rocky linux test container

[DonaldChung-HK]

Hi,

Just a minor issue, It seems that in the test/Dockerfile.rocky-9 the k8s version is set to 1.28 which is deprecated and so it causes the dnf failed to resolved and thus the test container failed to build. This can be fixed be setting ARG kubernetes_version=1.29

Thanks

[ctalledo]

Thanks @DonaldChung-HK for the heads-up.

I don't have a Rocky Linux machine so can't test, but would really appreciate it if you could make the fix(es) in the Dockerfile and open a PR.

Apart from updating kubernetes_version, I also see we need to update k8s_version and probably crictl_version too, but since I can't test it I prefer not to do it.

Thanks!