Update installation instructions to use podman in a WSL machine

This has been previously discussed in [a podman issue](https://github.com/containers/podman/issues/5722).

On the (Podman Installation)[https://podman.io/getting-started/installation] page, for installing podman in a WSL machine, the article (How to run Podman on Windows with WSL2)[https://www.redhat.com/sysadmin/podman-windows-wsl2]. Though the article is well written and a good starting point, some information is outdated. Suggestion is to add comments on the installation page:

- [ ] The config file does now reside on `/usr/share/containers/containers.conf`
- [ ] *optional, since this is not a Podman issue but still helpful* Default for WSL machines might be WSL1, not WSL2 and emphasize, that users should check this and change it as necessary.
- [ ] *optional, since this is not a Podman issue but still helpful* Since most users may run instances serving some process on a port in the Linux machine, ports are not automatically accessible via the localhost of the Windows machine.