add changelog for 1.4.2

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: antonwolfy

CHANGELOG.md

@@ -4,7 +4,7 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## [dev] (MM/DD/YYYY)
+## [1.4.2] (06/30/2026)
 
 ### Changed
 * Removed `numpy-base` dependency and `USE_NUMPY_BASE` environment variable from conda recipe [gh-124](https://github.com/IntelPython/mkl_random/pull/124)