Add a CHANGELOG entry for #133

Pull-request: #394

Author: williamdes

CHANGELOG.md

@@ -6,6 +6,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
 ## [Unreleased] - YYYY-MM-DD
 
+- Add `TZ` env var to change PHP `date.timezone` (#133)
+
 ## [5.2.1] - 2023-02-08
 
 - Move docker-compose test files into a folder