add section header

Author: ethanpalm

guides/migration.mdx

@@ -145,6 +145,8 @@ Confirm that all of your pages have been migrated then add these files to the do
 
 Migrate your documentation from any platform with full control over the process.
 
+### Content migration
+
 To migrate your content to Mintlify, you will need:
 
 - A valid `docs.json` for your site settings and navigation. See [Global settings](/settings) and [Navigation](/navigation) for more information.
@@ -153,7 +155,7 @@ To migrate your content to Mintlify, you will need:
 
 ### Asset migration
 
-1. **Copy assets** to your repository's `images/` directory
+1. **Copy assets** to your repository's `images/` directory.
 2. **Update references** in your MDX files:
    ```mdx
    ![Alt text](/images/screenshot.png)