docs: Fix typo (#51517)

Change tranforming to transforming in 05-mdx.mdx

docs/02-app/01-building-your-application/06-configuring/05-mdx.mdx

@@ -19,7 +19,7 @@ Output:
 
 [MDX](https://mdxjs.com/) is a superset of markdown that lets you write [JSX](https://react.dev/learn/writing-markup-with-jsx) directly in your markdown files. It is a powerful way to add dynamic interactivity and embed React components within your content.
 
-Next.js can support both local MDX content inside your application, as well as remote MDX files fetched dynamically on the server. The Next.js plugin handles tranforming Markdown and React components into HTML, including support for usage in Server Components (default in `app`).
+Next.js can support both local MDX content inside your application, as well as remote MDX files fetched dynamically on the server. The Next.js plugin handles transforming Markdown and React components into HTML, including support for usage in Server Components (default in `app`).
 
 ## `@next/mdx`