docs: update

Author: xjh22222228

README.md

@@ -105,6 +105,7 @@
 
 - JavaScript
   - [marked](https://github.com/markedjs/marked) ★ 35963 - A markdown parser and compiler. Built for speed.
+  - [markdown-exit](https://github.com/serkodev/markdown-exit) ★ 35963 - Fast, customizable Markdown parser and renderer with full CommonMark support. TypeScript rewrite of markdown-it with enhancements.
   - [markdown-it](https://github.com/markdown-it/markdown-it) ★ 20564 - Markdown parser, done right. 100% CommonMark support, extensions, syntax plugins & high speed.
     - [markdown-it-anchor](https://github.com/valeriangalliat/markdown-it-anchor) A markdown-it plugin that adds an `id` attribute to headings and optionally permalinks.
     - [markdown-it-async](https://github.com/antfu/markdown-it-async) Enhance markdown-it to support async highlight function.

README_zh-CN.md

@@ -105,6 +105,7 @@
 
 - JavaScript
   - [marked](https://github.com/markedjs/marked) ★ 35963 - Markdown 解析器和编译器。 专为提高速度而设计。
+  - [markdown-exit](https://github.com/serkodev/markdown-exit) ★ 35963 - 快速、可定制的 Markdown 解析器和渲染器，完全支持 CommonMark。基于 Markdown-it 的 TypeScript 重写版本，并进行了增强。
   - [markdown-it](https://github.com/markdown-it/markdown-it) ★ 20564 - Markdown 解析器， 100％CommonMark 支持，扩展，语法插件和高速。
     - [markdown-it-anchor](https://github.com/valeriangalliat/markdown-it-anchor) 一个 markdown-it 插件，为标题和可选的永久链接添加一个`id`属性。
     - [markdown-it-async](https://github.com/antfu/markdown-it-async) 增强 markdown 功能，支持异步高亮功能。