changelog: add notes about closing #12308

[skip ci]

CHANGELOG.md

@@ -8,8 +8,9 @@
 
 ### Minor
 
-* **Datasource Proxy**: Keep trailing slash for datasource proxy requests [#13326](https://github.com/grafana/grafana/pull/13326), thx [@ryantxu](https://github.com/ryantxu)
+* **Cloudwatch**: Show all available CloudWatch regions [#12308](https://github.com/grafana/grafana/issues/12308), thx [@mtanda](https://github.com/mtanda)
 * **Units**: New clock time format, to format ms or second values as for example `01h:59m`, [#13635](https://github.com/grafana/grafana/issues/13635), thx [@franciscocpg](https://github.com/franciscocpg)
+* **Datasource Proxy**: Keep trailing slash for datasource proxy requests [#13326](https://github.com/grafana/grafana/pull/13326), thx [@ryantxu](https://github.com/ryantxu)
 
 ### Breaking changes