changelog: adds note about closing #13945

CHANGELOG.md

@@ -17,6 +17,7 @@
 * **Datasource Proxy**: Keep trailing slash for datasource proxy requests [#13326](https://github.com/grafana/grafana/pull/13326), thx [@ryantxu](https://github.com/ryantxu)
 * **DingDing**: Can't receive DingDing alert when alert is triggered [#13723](https://github.com/grafana/grafana/issues/13723), thx [@Yukinoshita-Yukino](https://github.com/Yukinoshita-Yukino)
 * **Internal metrics**: Renamed `grafana_info` to `grafana_build_info` and added branch, goversion and revision [#13876](https://github.com/grafana/grafana/pull/13876)
+* **Alerting**: Increaste default duration for queries [#13945](https://github.com/grafana/grafana/pull/13945)
 
 ### Breaking changes