Clarify markdown flavor in Markdown Page

src/content/docs/en/guides/markdown-content.mdx

@@ -11,7 +11,7 @@ import { Steps } from '@astrojs/starlight/components';
 
 [Markdown](https://daringfireball.net/projects/markdown/) is commonly used to author text-heavy content like blog posts and documentation. Astro includes built-in support for Markdown files that can also include [frontmatter YAML](https://dev.to/paulasantamaria/introduction-to-yaml-125f) to define custom properties such as a title, description, and tags.
 
-In Astro, you can author content in Markdown, then render it in `.astro` components. This combines a familiar writing format designed for content with the flexibility of Astro's component syntax and architecture.
+In Astro, you can author content in [GitHub Flavored Markdown](https://github.github.com/gfm/), then render it in `.astro` components. This combines a familiar writing format designed for content with the flexibility of Astro's component syntax and architecture.
 
 :::tip
 For additional functionality, such as including components and JSX expressions in Markdown, add the [`@astrojs/mdx` integration](/en/guides/integrations-guide/mdx/) to write your Markdown content using [MDX](https://mdxjs.com/).