Fixed the changelog

Signed-off-by: Martin Weise <martin.weise@tuwien.ac.at>

.docs/changelog.md

@@ -6,6 +6,8 @@ author: Martin Weise
 
 #### Features
 
+* Refactored internal Java-based testing data that improves test consistency
+  in [#510](https://gitlab.phaidra.org/fair-data-austria-db-repository/fda-services/-/issues/510).
 * Added automated dashboard generation for all public databases where each view has an overview of its data and
   schema in [#460](https://gitlab.phaidra.org/fair-data-austria-db-repository/fda-services/-/issues/460).