Docs: change latest version to 1.2.0-rc.2 (#405)

Signed-off-by: barnettZQG <barnett.zqg@gmail.com>

docs/install.mdx

@@ -156,7 +156,7 @@ helm repo update
 2. Install KubeVela Core
 
 ```shell script
-helm install --create-namespace -n vela-system kubevela kubevela/vela-core --version 1.2.0-rc.1 --wait
+helm install --create-namespace -n vela-system kubevela kubevela/vela-core --version 1.2.0-rc.2 --wait
 ```
 
 3. Verify KubeVela Core installation
@@ -212,7 +212,7 @@ KubeVela CLI provides an easy to engage. We install VelaUX extensions through CL
 ** MacOS/Linux **
 
 ```shell script
-curl -fsSl https://kubevela.io/script/install.sh | bash -s 1.2.0-rc.1
+curl -fsSl https://kubevela.io/script/install.sh | bash -s 1.2.0-rc.2
 ```
 
 **Windows**

docs/platform-engineers/advanced-install.mdx

@@ -26,7 +26,7 @@ helm install --create-namespace -n vela-system --set admissionWebhooks.certManag
 
 Add flag `--devel` in command `helm search` to choose a pre-release
 version in format `<next_version>-beta.<version>`. It means a beta version of `<next_version>`,
-such as `1.2.0-rc.1`.
+such as `1.2.0-rc.2`.
 
 ```shell script
 helm search repo kubevela/vela-core -l --devel

i18n/zh/docusaurus-plugin-content-docs/current/install.mdx

@@ -162,7 +162,7 @@ helm repo update
 2. 安装 KubeVela Core
 
 ```shell script
-helm install --create-namespace -n vela-system kubevela kubevela/vela-core --version 1.2.0-rc.1 --wait
+helm install --create-namespace -n vela-system kubevela kubevela/vela-core --version 1.2.0-rc.2 --wait
 ```
 
 3. 验证 KubeVela Core 安装是否成功
@@ -218,7 +218,7 @@ KubeVela CLI 提供了便捷的应用终端管理能力，我们通过 CLI 来
 ** MacOS/Linux **
 
 ```shell script
-curl -fsSl https://kubevela.io/script/install.sh | bash -s 1.2.0-rc.1
+curl -fsSl https://kubevela.io/script/install.sh | bash -s 1.2.0-rc.2
 ```
 
 **Windows**

i18n/zh/docusaurus-plugin-content-docs/current/platform-engineers/advanced-install.mdx

@@ -26,7 +26,7 @@ helm install --create-namespace -n vela-system --set admissionWebhooks.certManag
 
 ## 安装预发布版
 
-在使用 `helm search` 命令时，添加标记参数 `--devel` 即可搜索出预发布版。预发布版的版本号格式为 `<next_version>-beta.<version>`，例如 `1.2.0-rc.1`，代表的是 `<next_version>` 版本的试验版本。
+在使用 `helm search` 命令时，添加标记参数 `--devel` 即可搜索出预发布版。预发布版的版本号格式为 `<next_version>-beta.<version>`，例如 `1.2.0-rc.2`，代表的是 `<next_version>` 版本的试验版本。
 
 ```shell script
 helm search repo kubevela/vela-core -l --devel

i18n/zh/docusaurus-plugin-content-docs/version-v1.1/install.mdx

@@ -7,7 +7,7 @@ import TabItem from "@theme/TabItem";
 
 > 如果是要升级现有的 KubeVela，请直接阅读[升级指南](./platform-engineers/advanced-install#升级).
 
-> 1.2.0-rc.1 版本已发布，欢迎试用。[去安装](/zh/docs/next/install)
+> 1.2.0-rc.2 版本已发布，欢迎试用。[去安装](/zh/docs/next/install)
 
 ## 1. 选择放置控制平面的集群
 
@@ -50,11 +50,13 @@ minikube addons enable ingress
 <TabItem value="rke">
 
 {" "}
+
 <b>（1）安装 Docker (可选):</b>
 
 RKE 的安装依赖于 Docker, 如未安装，请参考 [Docker 安装指南](https://docs.docker.com/engine/install/).
 
 {" "}
+
 <b>（2）安装 RKE 命令行:</b>
 
 下载 RKE 二进制文件， [前往 RKE Release 页面](https://github.com/rancher/rke/releases).
@@ -67,6 +69,7 @@ chmod +x /usr/bin/rke
 ```
 
 {" "}
+
 <b>（3）安装 Kubernetes 集群:</b>
 
 ```shell script

versioned_docs/version-v1.1/install.mdx

@@ -7,7 +7,7 @@ import TabItem from "@theme/TabItem";
 
 > For upgrading existing KubeVela, please read the [upgrade guide](./platform-engineers/advanced-install/#upgrade).
 
-> the 1.2.0-rc.1 version is released, [go to install](/docs/next/install)
+> the 1.2.0-rc.2 version is released, [go to install](/docs/next/install)
 
 ## 1. Choose Control Plane Cluster