update changelog

Author: meech-ward

CHANGELOG.md

@@ -5,6 +5,11 @@ 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).
 
+## [0.3.1] - 2025-03-10
+
+### Fixed
+- Fix package dependency for AsyncObservable
+
 ## [0.3.0] - 2025-03-10
 
 ### Changed