changelog: adds note about closing #10029

[ci skip]

CHANGELOG.md

@@ -9,6 +9,7 @@
 ### Minor
 * **OpsGenie**: Add triggered alerts as description [#11046](https://github.com/grafana/grafana/pull/11046), thx [@llamashoes](https://github.com/llamashoes)
 * **Cloudwatch**: Support high resolution metrics [#10925](https://github.com/grafana/grafana/pull/10925), thx [@mtanda](https://github.com/mtanda)
+* **Cloudwatch**: Add dimension filtering to CloudWatch `dimension_values()` [#10029](https://github.com/grafana/grafana/issues/10029), thx [@willyhutw](https://github.com/willyhutw)
 
 # 5.0.1 (2018-03-08)