RSS package doesn't support images

[markoa]

Astro Info

Astro                    v5.1.0
Node                     v23.1.0
System                   macOS (arm64)
Package Manager          npm
Output                   static
Adapter                  none
Integrations             @astrojs/tailwind
                         @astrojs/mdx

If this issue only occurs in one browser, which browser is a problem?

No response

Describe the Bug

Including full post content is RSS 101. The recipe to that doesn't produce valid image paths.

What's the expected result?

The recipe should generate content with valid image paths. Ideally it would with MDX too.

Link to Minimal Reproducible Example

https://docs.astro.build/en/recipes/rss/#including-full-post-content

Participation

• [ ] I am willing to submit a pull request for this issue.