doc(changlog): added changelog for emoji picker

Author: Lenghak

apps/www/content/docs/components/changelog.mdx

@@ -11,6 +11,10 @@ Use the [CLI](https://platejs.org/docs/components/cli) to install the latest ver
 
 ## October 2024 #15
 
+### October 4 #15.2
+
+- feat `emoji-picker`: adjust ui emoji picker
+
 ### October 1 #15.1
 
 - New `block-selection.tsx` component for visual selection feedback