changelog: add notes about closing #8207

CHANGELOG.md

@@ -2,6 +2,7 @@
 
 ### Minor
 * **Pushover**: Adds support for images in pushover notifier [#10780](https://github.com/grafana/grafana/issues/10780), thx [@jpenalbae](https://github.com/jpenalbae)
+* **Cloudwatch**: Add `resource_arns` template variable query function [#8207](https://github.com/grafana/grafana/issues/8207), thx [@jeroenvollenbrock](https://github.com/jeroenvollenbrock)
 * **Cloudwatch**: Add AWS/Neptune metrics [#14231](https://github.com/grafana/grafana/issues/14231), thx [@tcpatterson](https://github.com/tcpatterson)
 * **Stackdriver**: Template variables in filters using globbing format [#15182](https://github.com/grafana/grafana/issues/15182)