Update concepts-network.md

fix broken links

Author: zioproto

articles/aks/concepts-network.md

@@ -282,3 +282,6 @@ For more information on core Kubernetes and AKS concepts, see the following arti
 [ip-preservation]: https://techcommunity.microsoft.com/t5/fasttrack-for-azure/how-client-source-ip-preservation-works-for-loadbalancer/ba-p/3033722#:~:text=Enable%20Client%20source%20IP%20preservation%201%20Edit%20loadbalancer,is%20the%20same%20as%20the%20source%20IP%20%28srjumpbox%29.
 [nsg-traffic]: ../virtual-network/network-security-group-how-it-works.md
 [azure-cni-aks]: configure-azure-cni.md
+[azure-cni-overlay]: azure-cni-overlay.md
+[azure-cni-powered-by-cilium]: azure-cni-powered-by-cilium.md
+[use-byo-cni]: use-byo-cni.md