fix: Reference emoji in example

Co-authored-by: Amgelo563 <61554601+Amgelo563@users.noreply.github.com>

Author: Jiralite

guide/additional-info/updating-from-v14.md

@@ -134,7 +134,7 @@ The following error codes have been removed as they either have no use or are ha
 `Emoji#imageURL()` now dynamically handles the extension. Previously, you would have to do this:
 
 ```js
-emoji.imageURL({ extension: this.animated ? 'gif' : 'webp' });
+emoji.imageURL({ extension: emoji.animated ? 'gif' : 'webp' });
 ```
 
 Now, you can simply do this: