Update changelog

(cherry picked from commit 4c95b32e)

CHANGELOG.rst

@@ -6,6 +6,16 @@ All notable changes to this project will be documented in this file.
 The format is based on `Keep a Changelog`_,
 and this project adheres to `Semantic Versioning`_.
 
+Unreleased
+----------
+
+Fixed
+~~~~~
+
+* It wasn't possible to run data checks due to broken color data checks.
+* Recurrence information for calendar events weren't removed on deletion.
+* [Dev] AddressInputType missed country field.
+
 `4.0`_ - 2025-03-29
 -------------------