Update changelog

CHANGELOG.md

@@ -5,6 +5,12 @@ 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
+
+### Changed
+
+- Integrated dividend into the transaction point concept in the portfolio service
+
 ## 2.61.1 - 2024-03-06
 
 ### Fixed
@@ -16,7 +22,6 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Changed
 
 - Optimized the calculation of the portfolio summary
-- Integrated dividend into the transaction point concept in the portfolio service
 
 ### Fixed