chore(stackable-versioned): Update changelog

Author: Techassi

crates/stackable-versioned/CHANGELOG.md

@@ -4,6 +4,21 @@ All notable changes to this project will be documented in this file.
 
 ## [Unreleased]
 
+### Added
+
+- Implement basic ground work for downgrading custom resources ([#1033]).
+  - Emit `From` implementations to downgrade custom resource specs.
+  - Emit a status struct when multiple versions are defined to be able to track
+    values required during downgrades and upgrades of custom resources.
+
+### Changed
+
+- BREAKING: The `convert_with` parameter of the `changed()` action was renamed and split into two
+  parts to be able to control the conversion during upgrades and downgrades: `upgrade_with` and
+  `downgrade_with` ([#1033]).
+
+[#1033]: https://github.com/stackabletech/operator-rs/pull/1033
+
 ### Fixed
 
 - Correctly handle fields added in later versions ([#1031]).