Update CHANGELOG.md

Author: adsa95

CHANGELOG.md

@@ -4,6 +4,12 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic
 Versioning](http://semver.org/spec/v2.0.0.html).
 
+## Unreleased
+
+### Fixed
+
+- Do not treat columns with partial unique indexes as unique in psql driver.
+
 ## [4.19.1] - 2025-05-20
 
 ### Fixed