changelog: adds note about closing #9645

CHANGELOG.md

@@ -14,6 +14,8 @@
 * **Postgres/MySQL**: add __timeGroup macro for mysql [#9596](https://github.com/grafana/grafana/pull/9596), thanks [@svenklemm](https://github.com/svenklemm)
 * **Text**: Text panel are now edited in the ace editor. [#9698](https://github.com/grafana/grafana/pull/9698), thx [@mtanda](https://github.com/mtanda)
 
+## Minor
+* **Alert panel**: Adds placeholder text when no alerts are within the time range [#9624](https://github.com/grafana/grafana/issues/9624), thx [@straend](https://github.com/straend)
 
 ## Tech
 * **RabbitMq**: Remove support for publishing events to RabbitMQ [#9645](https://github.com/grafana/grafana/issues/9645)