Update GFM render API link (#75)

pd4d10 · web-flow · commit 888d5a03223a · 2020-10-20T14:24:11.000+02:00
diff --git a/readme.md b/readme.md
@@ -42,7 +42,7 @@ Import the `github-markdown.css` file and add a `markdown-body` class to the con
 </article>
 ```
 
-If you want code syntax highlighted, use GitHub Flavored Markdown rendered from [GitHub's `/markdown` API](https://developer.github.com/v3/markdown/).
+If you want code syntax highlighted, use GitHub Flavored Markdown rendered from [GitHub's `/markdown` API](https://docs.github.com/en/free-pro-team@latest/rest/reference/markdown).
 
 ## How
 
