Update changelog to release version 3.5.1 with IOP.Wrapper class details

Author: grongierisc

CHANGELOG.md

@@ -5,7 +5,7 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## [unreleased] - Unreleased
+## [3.5.1] - 2025-07-22
 ### Added
 - New IOP.Wrapper class for simplified python module import into IRIS with remote debugging support and traceback handling