docs: fix incorrect heading structure in codemods (#57605)

Fixes #57593

Author: its-kunal

docs/02-app/01-building-your-application/09-upgrading/01-codemods.mdx

@@ -28,7 +28,7 @@ Replacing `<transform>` and `<path>` with appropriate values.
 
 #### Migrate `ImageResponse` imports
 
-#### `next-og-import`
+##### `next-og-import`
 
 ```bash filename="Terminal"
 npx @next/codemod@latest next-og-import .
@@ -50,7 +50,7 @@ import { ImageResponse } from 'next/og'
 
 #### Use `viewport` export
 
-#### `metadata-to-viewport-export`
+##### `metadata-to-viewport-export`
 
 ```bash filename="Terminal"
 npx @next/codemod@latest metadata-to-viewport-export .