changelog: add notes about closing #12282

[skip ci]

CHANGELOG.md

@@ -10,6 +10,7 @@
 * **Dashboard**: Prevent double-click when saving dashboard [#11963](https://github.com/grafana/grafana/issues/11963)
 * **Dashboard**: AutoFocus the add-panel search filter [#12189](https://github.com/grafana/grafana/pull/12189) thx [@ryantxu](https://github.com/ryantxu)
 * **Units**: W/m2 (energy), l/h (flow) and kPa (pressure) [#11233](https://github.com/grafana/grafana/pull/11233), thx [@flopp999](https://github.com/flopp999)
+* **Units**: Litre/min (flow) and milliLitre/min (flow) [#12282](https://github.com/grafana/grafana/pull/12282), thx [@flopp999](https://github.com/flopp999)
 * **Alerting**: Fix mobile notifications for Microsoft Teams alert notifier [#11484](https://github.com/grafana/grafana/pull/11484), thx [@manacker](https://github.com/manacker)
 
 # 5.2.0-beta1 (2018-06-05)