changelog: mark change as breaking

Author: adwk67

crates/stackable-operator/CHANGELOG.md

@@ -13,7 +13,8 @@ All notable changes to this project will be documented in this file.
 
 - BREAKING: `ClusterResources` now requires the objects added to implement `DeepMerge`.
   This is very likely a stackable-operator internal change, but technically breaking ([#1118]).
-- Add support for the SSH protocol for pulling git content ([#1121]).
+- BREAKING: Add support for the SSH protocol for pulling git content ([#1121]).
+  This is a user-facing breaking change and should also be highlighted by operators using this functionality.
 - Depend on the patched version of kube-rs available at <https://github.com/stackabletech/kube-rs>,
   ensuring the operators automatically benefit from the fixes ([#1124]).