doc: update README.md

README.md

@@ -163,11 +163,7 @@ export declare type RehypeVideoOptions = {
 - [`rehype-attr`](https://github.com/jaywcjlove/rehype-attr) New syntax to add attributes to Markdown.
 - [`rehype-rewrite`](https://github.com/jaywcjlove/rehype-rewrite) Rewrite element with rehype.
 - [`rehype-ignore`](https://github.com/jaywcjlove/rehype-ignore) Ignore content display via HTML comments, Shown in GitHub readme, excluded in HTML.
-- [`rehypejs`](https://github.com/rehypejs/rehype) HTML processor powered by plugins part of the [@unifiedjs](https://github.com/unifiedjs) collective
-- [`remark-parse`](https://www.npmjs.com/package/remark-parse) remark plugin to parse Markdown
-- [`remark-rehype`](https://www.npmjs.com/package/remark-rehype) remark plugin to transform to rehype
-- [`rehype-raw`](https://www.npmjs.com/package/rehype-raw) rehype plugin to reparse the tree (and raw nodes)
-- [`rehype-stringify`](https://www.npmjs.com/package/rehype-stringify) rehype plugin to serialize HTML
+- [`remark-github-blockquote-alert`](https://github.com/jaywcjlove/remark-github-blockquote-alert) Remark plugin to add support for [GitHub Alert](https://docs.github.com/en/get-started/writing-on-github/getting-started-with-writing-and-formatting-on-github/basic-writing-and-formatting-syntax#alerts)
 
 ## License