docs: update required node version

Author: meteorlxy

docs/guide/getting-started.md

@@ -12,7 +12,7 @@ You can try VuePress directly in your browser on [StackBlitz](https://stackblitz
 
 ### Prerequisites
 
-- [Node.js v18.16.0+](https://nodejs.org/)
+- [Node.js v18.19.0+](https://nodejs.org/)
 - Package manager like [pnpm](https://pnpm.io), [yarn](https://classic.yarnpkg.com/en/), [npm](https://www.npmjs.com), etc.
 
 ::: tip

docs/zh/guide/getting-started.md

@@ -12,7 +12,7 @@ VuePress v2 目前仍处于 RC (Release Candidate) 阶段。你已经可以用
 
 ### 依赖环境
 
-- [Node.js v18.16.0+](https://nodejs.org/)
+- [Node.js v18.19.0+](https://nodejs.org/)
 - 包管理器，如 [pnpm](https://pnpm.io/zh/)、[yarn](https://classic.yarnpkg.com/en/)、[npm](https://www.npmjs.com/) 等。
 
 ::: tip