Add CHANGELOG entries

Author: williamdes

CHANGELOG.md

@@ -4,6 +4,11 @@ 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/).
 
+## [5.2.3] - 2025-10-08
+
+- Update to PHP 8.3
+- Enable the `uploadprogress` extension
+
 ## [5.2.2] - 2025-01-21
 
 - Add `TZ` env var to change PHP `date.timezone` (#133)