add a new extension to the list

Author: laidrivm

docs/USING_ADVANCED.md

@@ -106,6 +106,7 @@ Marked can be extended using [custom extensions](/using_pro#extensions). This is
 |[Sequential Hooks](https://github.com/bent10/marked-extensions/tree/main/packages/sequential-hooks)|[`marked-sequential-hooks`](https://www.npmjs.com/package/marked-sequential-hooks)|Enables the sequential preprocessing and post-processing within [sequential hooks](https://github.com/bent10/marked-extensions#sequential-hooks)|
 |[Smartypants](https://github.com/markedjs/marked-smartypants)|[`marked-smartypants`](https://www.npmjs.com/package/marked-smartypants)|Use [smartypants](https://www.npmjs.com/package/smartypants) to use "smart" typographic punctuation for things like quotes and dashes.|
 |[Smartypants lite](https://github.com/calculuschild/marked-smartypants-lite)|[`marked-smartypants-lite`](https://www.npmjs.com/package/marked-smartypants-lite)|A faster lighter version of marked-smartypants that doesn't use any external dependencies to create "smart" typographic punctuation for things like quotes and dashes.|
+|[Typograf](https://github.com/laidrivm/marked-typograf)|[`marked-typograf`](https://www.npmjs.com/package/marked-typograf)|Use [typograf](https://www.npmjs.com/package/typograf) as a more powerful and extendable alternative to Smartypants for creating “smart” typographic punctuation, such as quotes and dashes.|
 |[XHTML](https://github.com/markedjs/marked-xhtml)|[`marked-xhtml`](https://www.npmjs.com/package/marked-xhtml)|Emit self-closing HTML tags for void elements (<br/>, <img/>, etc.) with a "/" as required by XHTML.|
 
 <h2 id="inline">Inline Markdown</h2>