fix(docs): update image hosting (#4680)

This PR updates the section on including images within Markdown

fern/pages/fern-docs/content/write-markdown.mdx

@@ -67,9 +67,7 @@ Read the [Introduction](/learn/overview/introduction).
 
 ## Images
 
-To use images in your Markdown pages, upload them to a service such as [Amazon S3](https://aws.amazon.com/media-sharing/) or [Google Cloud Storage](https://cloud.google.com/storage).
-
-Once you have the URL to your image, use [Markdown syntax to insert the image](https://www.markdownguide.org/basic-syntax/#images-1).
+You can use locally stored images or URLs to include images in your Markdown pages. Use either [Markdown syntax](https://www.markdownguide.org/basic-syntax/#images-1) or the [`<img>` HTML tag](https://developer.mozilla.org/en-US/docs/Web/HTML/Element/img) to insert the image.
 
 ## LaTeX