Update information from https://katacontainers.io/software/

[fidencio]

Bug report

What is the current behavior?

Basically everything on that part of the website is either pointing to the already decommissioned 1.x repos, or using outdated figures.

If the current behavior is a bug, please provide the steps to reproduce.

What is the expected behavior?

We should be pointing to github.com/kata-containers/kata-containers repo, and we should update our figures to reflect better what we support.

[fidencio]

/cc @SunnyCai1

[liubin]

And this line:

Kata Containers is available on many distributions. View the [distro specific install guides](https://github.com/kata-containers/documentation/tree/master/install)

This line is embedded into an HTML block, but using the markdown syntax.

[SunnyCai1]

Hi Fabiano & Liubin. I'm so sorry that I totally missed this. I'm working on updating the links right now.

In terms of the outdated figures, I believe that they were created by a community member a while ago, and I don't have access to the assets. Is there any new figure that I can replace those with?