chore: update changelog

Author: mrTuomoK

CHANGELOG.md

@@ -5,6 +5,127 @@ 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/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [4.X.X] - Month, XX, 202X
+
+### React
+
+#### Breaking
+
+- [Component] What are the breaking changes?
+
+#### Added
+
+- [Component] What is added?
+
+#### Changed
+
+Changes that are not related to specific components
+
+- [Component] What has been changed
+
+#### Fixed
+
+- [Component] What bugs/typos are fixed?
+
+### Core
+
+#### Breaking
+
+- [Component] What are the breaking changes?
+
+#### Added
+
+- [Component] What is added?
+
+#### Changed
+
+Changes that are not related to specific components
+
+- [Component] What has been changed
+
+#### Fixed
+
+- [Component] What bugs/typos are fixed?
+
+### Documentation
+
+#### Breaking
+
+- [Component] What are the breaking changes?
+
+#### Added
+
+- [Component] What is added?
+
+#### Changed
+
+Changes that are not related to specific components
+
+- [Component] What has been changed
+
+#### Fixed
+
+- [Component] What bugs/typos are fixed?
+
+### Figma
+
+#### Breaking
+
+- [Component] What are the breaking changes?
+
+#### Added
+
+- [Component] What is added?
+
+#### Changed
+
+Changes that are not related to specific components
+
+- [Component] What has been changed
+
+#### Fixed
+
+- [Component] What bugs/typos are fixed?
+
+### Icon kit
+
+#### Breaking
+
+- [Component] What are the breaking changes?
+
+#### Added
+
+- [Component] What is added?
+
+#### Changed
+
+Changes that are not related to specific components
+
+- [Component] What has been changed
+
+#### Fixed
+
+- [Component] What bugs/typos are fixed?
+
+### Hds-js
+
+#### Breaking
+
+- [Component] What are the breaking changes?
+
+#### Added
+
+- [Component] What is added?
+
+#### Changed
+
+Changes that are not related to specific components
+
+- [Component] What has been changed
+
+#### Fixed
+
+- [Component] What bugs/typos are fixed?
 ## [4.10.0] - January, 29, 2026
 
 Updated documentation build process for multi-version docs by replacing the `gatsby-source-git` setup with a local filesystem-based source and adding automatic version detection from the documentation directory structure.