Update changelog

CHANGELOG.md

@@ -5,6 +5,13 @@ 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
+
+### Fixed
+
+- Fixed the currency conversion for fees and values in the dividend import by applying the correct rate based on the activity date
+- Fixed the currency conversion for fees and values in the activities service by applying the correct rate based on the activity date
+
 ## 2.104.0 - 2024-08-17
 
 ### Added