Update CHANGELOG.md

Author: zobo

CHANGELOG.md

@@ -4,9 +4,9 @@ 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](http://semver.org/).
 
-## [Unreleased]
+## [1.39.0]
 
-- Xdebug control socket support for pause on Linux and Windows.
+- Xdebug control socket support for pause on Linux and Windows (Xdebug 3.5).
 
 ## [1.38.2]