neigh: Note in KPR that dual-stack neighbor discovery is supported
neigh: Note in KPR that dual-stack neighbor discovery is supported

Small note to make it explicit that both IPv4 and IPv6 neighbor discovery
is supported.

Signed-off-by: Daniel Borkmann <3d0f3b9ddcacec30c4008c5e030e6c13a478cb4f@iogearbox.net>

cilium/cilium,cilium/cilium,cilium/cilium,cilium/cilium,michi-covalent/cilium,michi-covalent/cilium,michi-covalent/cilium,michi-covalent/cilium,cilium/cilium,michi-covalent/cilium