chore(operator): Add changelog entry

Author: Techassi

crates/stackable-operator/CHANGELOG.md

@@ -4,6 +4,14 @@ All notable changes to this project will be documented in this file.
 
 ## [Unreleased]
 
+## [0.100.1] - 2025-10-23
+
+### Changed
+
+- Bump stackable-versioned to 0.8.3, refer to its [changelog](../stackable-versioned/CHANGELOG.md) ([#1110]).
+
+[#1110]: https://github.com/stackabletech/operator-rs/pull/1110
+
 ## [0.100.0] - 2025-10-16
 
 ### Added