update kubeedge docs

Signed-off-by: Bettygogo2021 <91529409+Bettygogo2021@users.noreply.github.com>

content/en/docs/v3.3/installing-on-linux/cluster-operation/add-edge-nodes.md

@@ -21,6 +21,7 @@ This tutorial demonstrates how to add an edge node to your cluster.
 ## Prerequisites
 
 - You have enabled [KubeEdge](../../../pluggable-components/kubeedge/).
+- To prevent compatability issues, you are advised to install Kubernetes v1.21.x or earlier.
 - You have an available node to serve as an edge node. The node can run either Ubuntu (recommended) or CentOS. This tutorial uses Ubuntu 18.04 as an example.
 - Edge nodes, unlike Kubernetes cluster nodes, should work in a separate network.
 

content/en/docs/v3.3/installing-on-linux/introduction/kubekey.md

@@ -85,5 +85,5 @@ If you want to use KubeKey to install both Kubernetes and KubeSphere 3.3.0, see
 
 - You can also run `./kk version --show-supported-k8s` to see all supported Kubernetes versions that can be installed by KubeKey.
 - The Kubernetes versions that can be installed using KubeKey are different from the Kubernetes versions supported by KubeSphere v3.3.0. If you want to [install KubeSphere 3.3.0 on an existing Kubernetes cluster](../../../installing-on-kubernetes/introduction/overview/), your Kubernetes version must be v1.19.x, v1.20.x, v1.21.x, v1.22.x, and v1.23.x (experimental support).
-- If you want to use KubeEdge, you are advised to install Kubernetes v1.22.x or earlier to prevent compatability issues.
+- If you want to use KubeEdge, you are advised to install Kubernetes v1.21.x or earlier to prevent compatability issues.
 {{</ notice >}}

content/en/docs/v3.3/pluggable-components/kubeedge.md

@@ -63,6 +63,10 @@ When you implement multi-node installation of KubeSphere on Linux, you need to c
 
 As you [install KubeSphere on Kubernetes](../../installing-on-kubernetes/introduction/overview/), you can enable KubeEdge first in the [cluster-configuration.yaml](https://github.com/kubesphere/ks-installer/releases/download/v3.3.0/cluster-configuration.yaml) file.
 
+{{< notice note >}}
+To prevent compatability issues, you are advised to install Kubernetes v1.21.x or earlier.
+{{</ notice >}}
+
 1. Download the file [cluster-configuration.yaml](https://github.com/kubesphere/ks-installer/releases/download/v3.3.0/cluster-configuration.yaml) and edit it.
 
     ```bash

content/zh/docs/v3.3/installing-on-linux/cluster-operation/add-edge-nodes.md

@@ -21,6 +21,7 @@ KubeSphere 利用 [KubeEdge](https://kubeedge.io/zh/) 将原生容器化应用
 ## 准备工作
 
 - 您需要启用 [KubeEdge](../../../pluggable-components/kubeedge/)。
+- 为了避免兼容性问题，建议安装 v1.21.x 及以下版本的 Kubernetes。
 - 您有一个可用节点作为边缘节点，该节点可以运行 Ubuntu（建议）或 CentOS。本教程以 Ubuntu 18.04 为例。
 - 与 Kubernetes 集群节点不同，边缘节点应部署在单独的网络中。
 

content/zh/docs/v3.3/installing-on-linux/introduction/kubekey.md

@@ -86,5 +86,5 @@ curl -sfL https://get-kk.kubesphere.io | VERSION=v2.2.1 sh -
 
 - 您也可以运行 `./kk version --show-supported-k8s`，查看能使用 KubeKey 安装的所有受支持的 Kubernetes 版本。
 - 能使用 KubeKey 安装的 Kubernetes 版本与 KubeSphere v3.3.0 支持的 Kubernetes 版本不同。如需[在现有 Kubernetes 集群上安装 KubeSphere 3.3.0](../../../installing-on-kubernetes/introduction/overview/)，您的 Kubernetes 版本必须为 v1.19.x，v1.20.x，v1.21.x，v1.22.x 或 v1.23.x（实验性支持）。
-- 如果您需要使用 KubeEdge，为了避免兼容性问题，建议安装 v1.22.x 及以下版本的 Kubernetes。
+- 如果您需要使用 KubeEdge，为了避免兼容性问题，建议安装 v1.21.x 及以下版本的 Kubernetes。
 {{</ notice >}} 

content/zh/docs/v3.3/pluggable-components/kubeedge.md

@@ -64,6 +64,10 @@ KubeEdge 的组件在两个单独的位置运行——云上和边缘节点上
 
 当您[在 Kubernetes 上安装 KubeSphere](../../installing-on-kubernetes/introduction/overview/) 时，需要先在 [cluster-configuration.yaml](https://github.com/kubesphere/ks-installer/releases/download/v3.3.0/cluster-configuration.yaml) 文件中启用 KubeEdge。
 
+{{< notice note >}}
+为了避免兼容性问题，建议安装 Kubernetes v1.21.x 及其以下版本。
+{{</ notice >}}
+
 1. 下载 [cluster-configuration.yaml](https://github.com/kubesphere/ks-installer/releases/download/v3.3.0/cluster-configuration.yaml) 文件并进行编辑。
 
     ```bash