Update CHANGELOG for version 1.5.2

Author: RalfG

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).
 
+## [1.5.2] - 2026-02-12
+
+### Fixed
+
+- `io.pepxml`: Fix inferring score when first `spectrum_query` item does not have `search_hit` items (fixes #142)
+
 ## [1.5.1] - 2025-12-22
 
 ### Fixed