docs(changelog): note about closing #7035

CHANGELOG.md

@@ -8,6 +8,7 @@
 * **Browser History**: Browser back/forward now works time ranges / zoom, [#7259](https://github.com/grafana/grafana/issues/7259)
 * **SingleStat**: Implements diff aggregation method for singlestat [#7234](https://github.com/grafana/grafana/issues/7234), thx [@oliverpool](https://github.com/oliverpool)
 * **Dataproxy**: Added setting to enable more verbose logging in dataproxy [#7209](https://github.com/grafana/grafana/pull/7209), thx [@Ricky-N](https://github.com/Ricky-N)
+* **Alerting**: Better information about why an alert triggered [#7035](https://github.com/grafana/grafana/issues/7035)
 
 ## Tech