docs(changelog): add note about closing #5003

CHANGELOG.md

@@ -12,6 +12,7 @@
 * **Graphite**: Add support for groupByNode, closes [#5613](https://github.com/grafana/grafana/pull/5613)
 * **Influxdb**: Add support for elapsed(), closes [#5827](https://github.com/grafana/grafana/pull/5827)
 * **OAuth**: Add support for generic oauth, closes [#4718](https://github.com/grafana/grafana/pull/4718)
+* **Cloudwatch**: Add support to expand multi select template variable, closes [#5003](https://github.com/grafana/grafana/pull/5003)
 
 ### Breaking changes
 * **SystemD**: Change systemd description, closes [#5971](https://github.com/grafana/grafana/pull/5971)