3556: Update Changelog

Author: turegjorup

CHANGELOG.md

@@ -5,9 +5,9 @@ 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)
 
-## [Unreleased]
-- Remove support for PHP 8.1 and 8.2
-- Remove support for Symfony versions lower than 6.4
+## [4.0.0] - 2025-01-13
+- Remove support for PHP 8.1 and 8.2 (BC)
+- Remove support for Symfony versions lower than 6.4 (BC)
 - Bump dependency requirements
 
 ## [3.1.0] - 2023-08-03