Document adding NVDIA node to cluster via K3Sup

**What do you want?**

Adding NVIDIA nodes can take custom arguments to choose the right containerd and install dependencies.

**Why do you want this?**

If considered I am happy to sponsor k3sup

**Recommended solution**

Custom steps given an NVIDIA node to add additional options to node and k3sup

**Additional context**

Share any other context you feel is relevant or adds to your case.