BumpVersionInChangelog: add new unreleased section to CHANGELOG.md

Author: louiswesterheide

CHANGELOG.md

@@ -5,6 +5,10 @@ All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](http://keepachangelog.com/) and this project adheres to [Semantic Versioning](https://semver.org/)
 
+### [Unreleased]
+
+### TODO: add at least one Added, Changed, Deprecated, Removed, Fixed or Security section
+
 ## [5.0.0] 2026-09-04
 
 ### Changed