Rancher backup operator Kubernetes version while migrating Rancher to a new cluster

[mrolmedo]

Hi team,

Summary

The Rancher docs for Migrating Rancher to a new cluster states:
"Since Rancher can be installed on any Kubernetes cluster, you can use this backup and restore method to migrate Rancher from one Kubernetes cluster to any other Kubernetes cluster. This method only migrates Rancher-related resources and won't affect other applications on the cluster. Refer to the support matrix to identify which Kubernetes cluster types and versions are supported for your Rancher version..
Although the GitHub repository states: Migrating your Rancher application between Kubernetes distributions of the same version.

I think we should clarify or add this to the Rancher docs.