changelog: add notes about closing #13172

[skip ci]

CHANGELOG.md

@@ -7,6 +7,7 @@
 ### Minor
 
 * **Datasource Proxy**: Keep trailing slash for datasource proxy requests [#13326](https://github.com/grafana/grafana/pull/13326), thx [@ryantxu](https://github.com/ryantxu)
+* **Elasticsearch**: Fix no limit size in terms aggregation for alerting queries [#13172](https://github.com/grafana/grafana/issues/13172), thx [@Yukinoshita-Yukino](https://github.com/Yukinoshita-Yukino)
 
 ### Breaking changes