docs: add changelog entry

Author: DannyvdSluijs

CHANGELOG.md

@@ -6,6 +6,9 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
+### Fixed
+- allow items: true to pass validation ([#801](https://github.com/jsonrainbow/json-schema/pull/801))
+
 ### Changed
 - Include actual count in collection constraint errors ([#797](https://github.com/jsonrainbow/json-schema/pull/797))