docs(changelog): align v0.16.0 release date to 2026-04-05

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: tercel

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).
 
-## [0.16.0] - 2026-04-03
+## [0.16.0] - 2026-04-05
 
 ### Added