Add enhanced non scalar parameter diagnostics to changelog

Ref. eng/recordflux/RecordFlux#1740

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
+
+- Enhance diagnostics when a message parameter is not a scalar (eng/recordflux/RecordFlux#1740)
+
 ## [0.22.0] - 2024-07-17
 
 ### Added
@@ -540,6 +546,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [0.1.0] - 2019-05-14
 
+[Unreleased]: https://github.com/AdaCore/RecordFlux/compare/v0.22.0...HEAD
 [0.22.0]: https://github.com/AdaCore/RecordFlux/compare/v0.21.0...v0.22.0
 [0.21.0]: https://github.com/AdaCore/RecordFlux/compare/v0.20.0...v0.21.0
 [0.20.0]: https://github.com/AdaCore/RecordFlux/compare/v0.19.0...0.20.0