add link to goldmark-tgmd renderer

README.md

@@ -495,6 +495,7 @@ Extensions
 - [goldmark-img64](https://github.com/tenkoh/goldmark-img64): Adds support for embedding images into the document as DataURL (base64 encoded).
 - [goldmark-enclave](https://github.com/quail-ink/goldmark-enclave): Adds support for embedding youtube/bilibili video, X's [oembed tweet](https://publish.twitter.com/), [tradingview](https://www.tradingview.com/widget/)'s chart, [quail](https://quail.ink)'s widget into the document.
 - [goldmark-wiki-table](https://github.com/movsb/goldmark-wiki-table): Adds support for embedding Wiki Tables.
+- [goldmark-tgmd](https://github.com/Mad-Pixels/goldmark-tgmd): A Telegram markdown renderer that can be passed to `goldmark.WithRenderer()`.
 
 ### Loading extensions at runtime
 [goldmark-dynamic](https://github.com/yuin/goldmark-dynamic) allows you to write a goldmark extension in Lua and load it at runtime without re-compilation.