docs: update pnpm package version

Author: moonrailgun

website/docs/deployment/cdn.md

@@ -13,9 +13,9 @@ In order to compile the front-end code separately, you need to download the sour
 git clone https://github.com/msgbyte/tailchat.git
 cd tailchat
 
-# You can switch between different distributions by git checkout v1.8.8
+# You can switch between different distributions by git, for example: git checkout v1.8.8
 
-pnpm install # You need to use `pnpm` to install dependencies, using other package management tools may cause problems
+pnpm install # You need to use `pnpm` to install dependencies, using other package management tools may cause problems. and you should use pnpm@8 because here is some break change in pnpm@9
 ```
 
 Wait patiently for dependencies to be installed

website/i18n/zh-Hans/docusaurus-plugin-content-docs/current/deployment/cdn.md

@@ -15,7 +15,7 @@ cd tailchat
 
 # 你可以通过 git checkout v1.8.8 来切换不同的发行版本
 
-pnpm install # 你需要使用 `pnpm` 来安装依赖，使用其他的包管理工具可能会出现问题
+pnpm install # 你需要使用 `pnpm` 来安装依赖，使用其他的包管理工具可能会出现问题. 另外你最好使用 pnpm@8 来进行安装，因为pnpm@9有一些不兼容的改动
 ```
 
 耐心等待依赖安装完毕