feat: moved over changelog assets

Author: Kapil Gowru

fern/products/docs/pages/changelog/2025-01-21.mdx

@@ -7,7 +7,7 @@ The accordion component has been upgraded so that you can now use your in-browse
 
 Try searching for **burst** on this page: https://dev.hume.ai/docs/expression-measurement/faq 
 
-<embed src="../../../../fern/assets/changelogs/docs/accordion.mp4" type="video/mp4" width="640px" height="360px" />
+<embed src="./accordion.mp4" type="video/mp4" width="640px" height="360px" />
 
 
 ## Support for embedding local assets