Updated changelog

Author: martinyde

CHANGELOG.md

@@ -6,6 +6,8 @@ Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
 
+* [PR-590](https://github.com/itk-dev/deltag.aarhus.dk/pull/590)
+  Deleted old timeline.
 * [PR-587](https://github.com/itk-dev/deltag.aarhus.dk/pull/587)
   Cleaned up translations
 * [PR-586](https://github.com/itk-dev/hoeringsportal/pull/586)