rdflib-utils: update changelog

Author: angelo-v

utils/rdflib/CHANGELOG.md

@@ -6,9 +6,18 @@ 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
+
+- [mockTurtleDocument](https://solid-contrib.github.io/data-modules/rdflib-utils/functions/test_support.mockTurtleDocument.html)
+  now allows to pass additional headers to include into the mock response
+- [mockLdpContainer](https://solid-contrib.github.io/data-modules/rdflib-utils/functions/test_support.mockLdpContainer.html)
+  now allows to pass additional headers to include into the mock response
+
 ## 0.5.0
 
-### Changes
+### Changed
 
 - [mockLdpContainer](https://solid-contrib.github.io/data-modules/rdflib-utils/functions/test_support.mockLdpContainer.html)
   now allows to add additional turtle to include into the mock response