update changelog

Author: corva-alex-s

CHANGELOG.md

@@ -5,6 +5,8 @@ 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
+- merge_events parameter for scheduled data time apps should result in correct start/end times in a final app event.
 
 ## [1.13.1] - 2025-02-17
 ### Fixed