add k8e to the Users doc
add k8e to the Users doc

Signed-off-by: Deshi Xiao <ce6baa22c65be7d48949d3dd3d85a2e1d4063969@gmail.com>
michi-covalent/cilium,cilium/cilium,cilium/cilium,cilium/cilium,michi-covalent/cilium,cilium/cilium,cilium/cilium,michi-covalent/cilium,michi-covalent/cilium,michi-covalent/cilium