Update changelog

Author: siegfriedweber

CHANGELOG.md

@@ -25,6 +25,9 @@ All notable changes to this project will be documented in this file.
 - BREAKING: The fields `connection` and `host` on `S3Connection` as well as `bucketName` on `S3Bucket`are now mandatory ([#632]).
 - Failing to parse one `DruidCluster`/`AuthenticationClass` should no longer cause the whole operator to stop functioning ([#638]).
 - Fix OIDC endpoint calculation in case the `rootPath` does have a trailing slash ([#656]).
+- BREAKING: Use distinct ServiceAccounts for the Stacklets, so that multiple Stacklets can be
+  deployed in one namespace. Existing Stacklets will use the newly created ServiceAccounts after
+  restart ([#655]).
 
 ### Removed
 
@@ -38,6 +41,7 @@ All notable changes to this project will be documented in this file.
 [#632]: https://github.com/stackabletech/druid-operator/pull/632
 [#637]: https://github.com/stackabletech/druid-operator/pull/637
 [#638]: https://github.com/stackabletech/druid-operator/pull/638
+[#655]: https://github.com/stackabletech/druid-operator/pull/655
 [#656]: https://github.com/stackabletech/druid-operator/pull/656
 
 ## [24.7.0] - 2024-07-24