Fix timestamp in change log.

Author: EreMaijala

CHANGELOG.md

@@ -5,7 +5,7 @@ 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).
 
-## 2.3.0 - 24.6.2024
+## 2.3.0 - 2024-06-24
 
 Anything marked with [**BC**] is known to affect backward compatibility with previous versions.