chore: update release date in CHANGELOG

Author: bartsli

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).
 
-## [0.9.8] - 2025-01-15
+## [0.9.8] - 2025-01-13
 
 ### Fixed
 - Fixed issue #8: Exclude null fields from JSON serialization to prevent WooCommerce API errors when optional fields are not set