Update CHANGELOG

Author: bendera

CHANGELOG.md

@@ -4,6 +4,11 @@ All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 
+## [Unreleased]
+
+- Fixed **SingleSelect** value not updated in the form data.
+- Fixed error in non-browser environments caused by `adoptedStyleSheets`.
+
 ## [2.5.0] - 2026-02-08
 
 ## Changed