add new rss recipe link to community guides (#8294)

Co-authored-by: Sarah Rainsberger <[email protected]>

src/content/docs/en/community-resources/content.mdx

@@ -58,6 +58,7 @@ Have you written a recipe for Astro? [Edit this page](https://github.com/withast
 - [Use a dynamic filename when importing images](https://vaihe.com/blog/astro/astro-dynamic-image-prop/)
 - [Add an RSS feed to Astro using Storyblok's stories](https://straffesites.com/en/blog/rss-feed-astro-storyblok)
 - [How to Send Any Data to Your RSS Feed? A Guide with Astro + RSS](https://aritraroy.live/tutorial/blogs/2023/how-to-send-any-data-to-rss-feed/)
+- [Adding RSS Feed Content and Fixing Markdown Image Paths in Astro](https://billyle.dev/posts/adding-rss-feed-content-and-fixing-markdown-image-paths-in-astro)
 ### Images
 - [Add blog post images to your Astro RSS Feed](https://webreaper.dev/posts/astro-rss-feed-blog-post-images/)
 - [Generate Open Graph images for an Astro blog](https://techsquidtv.com/blog/generating-open-graph-images-for-astro/)