chore: update CHANGELOG.md for 2.6.0

Author: isc-tleavitt

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).
 
-## [2.6.0] - Unreleased
+## [2.6.0] - 2024-10-07
 
 ### Added
 - Discards safeguarded by discard stash and warning modal (#455)