DOC: update CHANGELOG

CHANGELOG.md

@@ -5,6 +5,14 @@ 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).
 
+## v5.0.0, 2021.12.07
+
+### Changed
+
+- #34 - Update ruby verion (3.0.3 instead off 2.7.1)  <br>
+  requires a DS software version greater than 
+  or equal to [`2021-11-30-02`](https://github.com/betagouv/demarches-simplifiees.fr/releases/tag/2021-11-30-02)
+
 ## v4.0.1, 2021.10.20
 
 ### Fixed