changelog: add notes about closing #12668

[skip ci]

CHANGELOG.md

@@ -22,6 +22,7 @@
 * **Alerting**: Fix diff and percent_diff reducers [#11563](https://github.com/grafana/grafana/issues/11563), thx [@jessetane](https://github.com/jessetane)
 * **Units**: Polish złoty currency [#12691](https://github.com/grafana/grafana/pull/12691), thx [@mwegrzynek](https://github.com/mwegrzynek)
 * **Cloudwatch**: Improved error handling [#12489](https://github.com/grafana/grafana/issues/12489), thx [@mtanda](https://github.com/mtanda)
+* **Table**: Adjust header contrast for the light theme [#12668](https://github.com/grafana/grafana/issues/12668)
 
 # 5.2.2 (2018-07-25)
 
@@ -33,7 +34,6 @@
 * **Plugins**: Fix loading of external plugins [#12551](https://github.com/grafana/grafana/issues/12551)
 * **Dashboard**: Remove unwanted scrollbars in embedded panels [#12589](https://github.com/grafana/grafana/issues/12589)
 * **Prometheus**: Prevent error using $__interval_ms in query [#12533](https://github.com/grafana/grafana/pull/12533)
-* **Table**: Adjust header contrast for the light theme [#12668](https://github.com/grafana/grafana/issues/12668)
 
 # 5.2.1 (2018-06-29)