Fix link

Julien Bouquillon · web-flow · commit 8982d58f63c1 · 2021-03-08T08:44:36.000+01:00
Closes GH-1. Reviewed-by: Titus Wormer <tituswormer@gmail.com>
diff --git a/readme.md b/readme.md
@@ -412,4 +412,4 @@ abide by its terms.
 
 [dfn-mixin-mdx-jsx-element]: #mdxjsxelement
 
-[remark-mdx]: https://github.com/mdx-js/mdx/tree/next/packages/remark-mdx
+[remark-mdx]: https://github.com/mdx-js/mdx/tree/main/packages/remark-mdx

Original file line number	Diff line number	Diff line change
`@@ -412,4 +412,4 @@ abide by its terms.`
`412`	`412`
`413`	`413`	`[dfn-mixin-mdx-jsx-element]: #mdxjsxelement`
`414`	`414`
`415`		`-[remark-mdx]: https://github.com/mdx-js/mdx/tree/next/packages/remark-mdx`
	`415`	`+[remark-mdx]: https://github.com/mdx-js/mdx/tree/main/packages/remark-mdx`