changelog: add notes about closing #13575

[skip ci]

CHANGELOG.md

 # 5.4.0 (unreleased)
 
+### New Features
+
+* **Cloudwatch**: Automatically set graph yaxis unit [#13575](https://github.com/grafana/grafana/issues/13575), thx [@mtanda](https://github.com/mtanda)
+
 ### Minor
 
 * **Datasource Proxy**: Keep trailing slash for datasource proxy requests [#13326](https://github.com/grafana/grafana/pull/13326), thx [@ryantxu](https://github.com/ryantxu)
@@ -54,7 +58,7 @@
 * **Profile**: List teams that the user is member of in current/active organization [#12476](https://github.com/grafana/grafana/issues/12476)
 * **Configuration**: Allow auto-assigning users to specific organization (other than Main. Org) [#1823](https://github.com/grafana/grafana/issues/1823) [#12801](https://github.com/grafana/grafana/issues/12801), thx [@gzzo](https://github.com/gzzo) and [@ofosos](https://github.com/ofosos)
 * **Dataproxy**: Pass configured/auth headers to a Datasource [#10971](https://github.com/grafana/grafana/issues/10971), thx [@mrsiano](https://github.com/mrsiano)
-* **Cloudwatch**: CloudWatch GetMetricData support [#11487](https://github.com/grafana/grafana/issues/11487), thx [@mtanda](https://github.com/mtanda)
+* ****: **: CloudWatch GetMetricData support [#11487](https://github.com/grafana/grafana/issues/11487), thx [@mtanda](https://github.com/mtanda)
 * **Postgres**: TimescaleDB support, e.g. use `time_bucket` for grouping by time when option enabled [#12680](https://github.com/grafana/grafana/pull/12680), thx [svenklemm](https://github.com/svenklemm)
 * **Cleanup**: Make temp file time to live configurable [#11607](https://github.com/grafana/grafana/issues/11607), thx [@xapon](https://github.com/xapon)