adds note for #13914 and #14581

CHANGELOG.md

@@ -17,6 +17,7 @@
 * **Proxy whitelist**: Add CIDR capability to auth_proxy whitelist [#14546](https://github.com/grafana/grafana/issues/14546), thx [@jacobrichard](https://github.com/jacobrichard)
 * **OAuth**: Support OAuth providers that are not RFC6749 compliant [#14562](https://github.com/grafana/grafana/issues/14562), thx [@tdabasinskas](https://github.com/tdabasinskas)
 * **Units**: Add blood glucose level units mg/dL and mmol/L [#14519](https://github.com/grafana/grafana/issues/14519), thx [@kjedamzik](https://github.com/kjedamzik)
+* **Stackdriver**: Aggregating series returns more than one series [#14581](https://github.com/grafana/grafana/issues/14581) and [#13914](https://github.com/grafana/grafana/issues/13914), thx [@kinok](https://github.com/kinok)
 
 ### Bug fixes
 * **Search**: Fix for issue with scrolling the "tags filter" dropdown, fixes [#14486](https://github.com/grafana/grafana/issues/14486)