Fixed changlog

Fixed to follow changelog format

Author: ulfmansson

CHANGELOG.md

@@ -18,7 +18,7 @@ We use *breaking* word for marking changes that are not backward compatible (rel
 ### Changed
 
 ### Added
-- [#227](https://github.com/thanos-io/kube-thanos/pull/227) Added support for --grpc-client-tls-secure in query
+- [#227](https://github.com/thanos-io/kube-thanos/pull/227) query: Added support for --grpc-client-tls-secure 
 
 ### Fixed