Update changelog

Author: Techassi

crates/stackable-versioned/CHANGELOG.md

@@ -4,9 +4,12 @@ All notable changes to this project will be documented in this file.
 
 ## [Unreleased]
 
+- Generate `From` implementations for automatic conversion between versions
+  ([#CHANGEME]).
 - Improve action chain generation ([#764]).
 
 [#764](ttps://github.com/stackabletech/operator-rs/pull/764)
+[#CHANGEME](ttps://github.com/stackabletech/operator-rs/pull/CHANGEME)
 
 ## [0.1.0] - 2024-05-08