Update CHANGELOG

Author: ndgrigorian

CHANGELOG.md

@@ -9,6 +9,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Added
 * Enabled support of Python 3.14 [gh-79](https://github.com/IntelPython/mkl_random/pull/79)
 
+### Removed
+* Dropped support for Python 3.9 [gh-81](https://github.com/IntelPython/mkl_random/pull/81)
+
 ## [1.3.0] (10/06/2025)
 
 ### Changed