Update zh-cn/docs/concepts/cluster-administration/addons.md

Signed-off-by: wuyanping <wuyanping@uniontech.com>

Update content/zh-cn/docs/concepts/cluster-administration/addons.md

Co-authored-by: Michael <haifeng.yao@daocloud.io>

Update content/zh-cn/docs/concepts/cluster-administration/addons.md

Co-authored-by: Michael <haifeng.yao@daocloud.io>

Update content/zh-cn/docs/concepts/cluster-administration/addons.md

Co-authored-by: Michael <haifeng.yao@daocloud.io>

content/zh-cn/docs/concepts/cluster-administration/addons.md

@@ -99,6 +99,9 @@ Add-on 扩展了 Kubernetes 的功能。
 <!--
 * [Flannel](https://github.com/flannel-io/flannel#deploying-flannel-manually) is
   an overlay network provider that can be used with Kubernetes.
+* [Gateway API](/docs/concepts/services-networking/gateway/) is an open source project managed by
+  the [SIG Network](https://github.com/kubernetes/community/tree/master/sig-network) community and
+  provides an expressive, extensible, and role-oriented API for modeling service networking.
 * [Knitter](https://github.com/ZTE/Knitter/) is a plugin to support multiple network
   interfaces in a Kubernetes pod.
 * [Multus](https://github.com/k8snetworkplumbingwg/multus-cni) is a Multi plugin for
@@ -108,6 +111,9 @@ Add-on 扩展了 Kubernetes 的功能。
 -->
 * [Flannel](https://github.com/flannel-io/flannel#deploying-flannel-manually)
   是一个可以用于 Kubernetes 的 overlay 网络提供者。
+* [Gateway API](/zh-cn/docs/concepts/services-networking/gateway/) 是一个由
+  [SIG Network](https://github.com/kubernetes/community/tree/master/sig-network) 社区管理的开源项目，
+  为服务网络建模提供一种富有表达力、可扩展和面向角色的 API。
 * [Knitter](https://github.com/ZTE/Knitter/) 是在一个 Kubernetes Pod 中支持多个网络接口的插件。
 * [Multus](https://github.com/k8snetworkplumbingwg/multus-cni) 是一个多插件，
   可在 Kubernetes 中提供多种网络支持，以支持所有 CNI 插件（例如 Calico、Cilium、Contiv、Flannel），