chore: Update changelog

Author: NickLarsenNZ

CHANGELOG.md

@@ -20,8 +20,10 @@ All notable changes to this project will be documented in this file.
 - Make the environment variables `OPENSEARCH_HOME` and `OPENSEARCH_PATH_CONF` overridable, so that
   images can be used which have a different directory structure than the Stackable image ([#18]).
 - Add Prometheus labels and annotations to role-group services ([#26]).
+- Helm: Allow Pod `priorityClassName` to be configured ([#34]).
 
 [#10]: https://github.com/stackabletech/opensearch-operator/pull/10
 [#17]: https://github.com/stackabletech/opensearch-operator/pull/17
 [#18]: https://github.com/stackabletech/opensearch-operator/pull/18
 [#26]: https://github.com/stackabletech/opensearch-operator/pull/26
+[#34]: https://github.com/stackabletech/opensearch-operator/pull/34