Add link to blog post in feature1.md

Added a link to the blog post for more information.

Author: scottjenson

data/roadmap/feature1.md

@@ -3,4 +3,4 @@ title: Quote Posts
 status: released
 ---
 
-Version 4.5: Users can now quote others posts. Users can opt out entirely from all quoting or remove themselves from a quoted post if they wish.
+Version 4.5: Users can now quote others posts. Users can opt out entirely from all quoting or remove themselves from a quoted post if they wish. [Learn more.](https://blog.joinmastodon.org/2025/09/introducing-quote-posts/)