docs: ceph: add no support for changing networking
docs: ceph: add no support for changing networking

Clarify in the docs that changing networking modes after a Cpeh cluster
has been deployed is not supported and can result in a nonfunctional
cluster.

Signed-off-by: Blaine Gardner <135b86f2968bdbcc730c10d8ababd343bb675986@suse.com>

rook/nfs,rook/nfs,rook/rook,rook/nfs,rook/rook,rook/rook,rook/rook,rook/rook