Update Requirements documentation for OS compatibility

[Woovie]

When choosing what operating system to use with RKE2, you will find yourself on this page: https://docs.rke2.io/install/requirements

The matrix of operating systems is out of date and inaccurate compared to the SUSE support matrix: https://www.suse.com/suse-rke2/support-matrix/all-supported-versions/rke2-v1-29/

I think it might be better to simply link to the SUSE document instead, providing a single source of truth instead of maintaining identical lists in two places. The other option being of course to simply keep this page up to date.