release: v3.15.4 (#1222)

## [v3.15.4] (Sep 26th, 2024)

### Features
- Added stringSet for date format and applied them
  | Key | Value |
  | --- | ----- |
  | DATE_FORMAT__MESSAGE_CREATED_AT | `'p'` |
  | DATE_FORMAT__UNREAD_SINCE | `'p MMM dd'` |
  | DATE_FORMAT__LAST_MESSAGE_CREATED_AT__TODAY | `'p'` |
  | DATE_FORMAT__LAST_MESSAGE_CREATED_AT__THIS_YEAR | `'MMM d'` |
  | DATE_FORMAT__LAST_MESSAGE_CREATED_AT__PREVIOUS_YEAR | `'yyyy/M/d'` |

Author: HoonBaek

CHANGELOG.md

@@ -1,5 +1,17 @@
 # Changelog - v3
 
+## [v3.15.4] (Sep 26th, 2024)
+
+### Features
+- Added stringSet for date format and applied them
+  | Key | Value |
+  | --- | ----- |
+  | DATE_FORMAT__MESSAGE_CREATED_AT | `'p'` |
+  | DATE_FORMAT__UNREAD_SINCE | `'p MMM dd'` |
+  | DATE_FORMAT__LAST_MESSAGE_CREATED_AT__TODAY | `'p'` |
+  | DATE_FORMAT__LAST_MESSAGE_CREATED_AT__THIS_YEAR | `'MMM d'` |
+  | DATE_FORMAT__LAST_MESSAGE_CREATED_AT__PREVIOUS_YEAR | `'yyyy/M/d'` |
+
 ## [v3.15.3] (Sep 12th, 2024)
 
 ### Fixes

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@sendbird/uikit-react",
-  "version": "3.15.3",
+  "version": "3.15.4",
   "description": "Sendbird UIKit for React: A feature-rich and customizable chat UI kit with messaging, channel management, and user authentication.",
   "keywords": [
     "sendbird",