docs: add changelog entry

Author: DannyvdSluijs

CHANGELOG.md

@@ -8,6 +8,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## [Unreleased]
 ### Fixed
 - only check minProperties or maxProperties on objects ([#802](https://github.com/jsonrainbow/json-schema/pull/802))
+- avoid duplicate workflow runs ([#804](https://github.com/jsonrainbow/json-schema/pull/804))
 
 ## [6.2.1] - 2025-03-06
 ### Fixed