docs: Improve llms.txt documentation formatting (#1403)

Co-authored-by: fern-api[bot] <115122769+fern-api[bot]@users.noreply.github.com>
Co-authored-by: Fern Support <[email protected]>

Author: fern-api[bot]

fern/products/docs/pages/seo/llms-txt.mdx

@@ -3,7 +3,11 @@ title: llms.txt and llms-full.txt
 description: Enable tools like Cursor, GitHub Copilot, ChatGPT, and Claude to understand your documentation.
 ---
 
-[llms.txt](https://llmstxt.org/) is a standard for exposing website content to AI developer tools. Fern automatically generates and maintains `llms.txt` and `llms-full.txt` files for your documentation site. When Fern detects an LLM bot accessing your documentation, it automatically serves Markdown instead of HTML, reducing token consumption by 90%+.
+[llms.txt](https://llmstxt.org/) is a standard for exposing website content to AI developer tools. Fern automatically generates and maintains `llms.txt` and `llms-full.txt` files for your documentation site.
+
+## Automatically serve Markdown
+
+When Fern detects an LLM bot accessing your documentation, it automatically serves Markdown instead of HTML, reducing token consumption by 90%+.
 
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