Documentation: update kvstore prefixes
Documentation: update kvstore prefixes

Now that we write to the kvstore if k8s-handover is enabled for CNPNodeStatus
updates, , update the documentation accordingly about the new prefix we use for
CNPNodeStatus updates.

Signed-off by: Ian Vernon <ian@cilium.io>

tklauser/cilium,michi-covalent/cilium,cilium/cilium,cilium/cilium,cilium-team/cilium,tklauser/cilium,cilium-team/cilium,tgraf/cilium,tgraf/cilium,tgraf/cilium,tgraf/cilium,tklauser/cilium,cilium/cilium,tklauser/cilium,michi-covalent/cilium,michi-covalent/cilium,tklauser/cilium,michi-covalent/cilium,cilium/cilium,cilium/cilium,tgraf/cilium,tgraf/cilium,michi-covalent/cilium