changelog: add notes about closing #14231

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 AWS/Neptune metrics [#14231](https://github.com/grafana/grafana/issues/14231), thx [@tcpatterson](https://github.com/tcpatterson)
 
 # 6.0.0-beta1 (2019-01-30)