Mark a change as breaking

#188

Signed-off-by: Craig Furman <[email protected]>

Author: craigfurman

CHANGELOG.md

@@ -13,10 +13,14 @@ We use *breaking* word for marking changes that are not backward compatible (rel
 
 ## Unreleased
 
-### Changed
+### Breaking Changes
 
 - [#188](https://github.com/thanos-io/kube-thanos/pull/188) Single ServiceMonitor for store shards
 
+### Changed
+
+-
+
 ### Added
 
 -