Update crates/stackable-operator/CHANGELOG.md

Co-authored-by: Siegfried Weber <[email protected]>

Author: labrenbe

crates/stackable-operator/CHANGELOG.md

@@ -6,7 +6,7 @@ All notable changes to this project will be documented in this file.
 
 ### Added
 
-- Inject vector aggregator address into vector config file using an environment variable ([#1000]).
+- BREAKING: Inject vector aggregator address into vector config file using an environment variable ([#1000]).
 
 [#1000]: https://github.com/stackabletech/operator-rs/pull/1000