add changelog entry

Author: xeniape

rust/stackablectl/CHANGELOG.md

@@ -4,6 +4,14 @@ All notable changes to this project will be documented in this file.
 
 ## [Unreleased]
 
+### Fixed
+
+- Switch to idempotent Helm installations for demos and stacks ([#386]).
+- Ignore failed re-application of Jobs due to immutability in demo and stack installations.
+  Display those manifests to the user, so they can decide if they need to delete and recreate it ([#386]).
+
+[#386]: https://github.com/stackabletech/stackable-cockpit/pull/386
+
 ## [1.0.0] - 2025-06-02
 
 ### Added