changelog: add notes about closing #5930

[skip ci]

CHANGELOG.md

@@ -9,6 +9,7 @@
 * **MSSQL**: Add encrypt setting to allow configuration of how data sent between client and server are encrypted [#13629](https://github.com/grafana/grafana/issues/13629), thx [@ramiro](https://github.com/ramiro)
 * **Stackdriver**: Not possible to authenticate using GCE metadata server [#13669](https://github.com/grafana/grafana/issues/13669)
 * **Teams**: Team preferences (theme, home dashboard, timezone) support [#12550](https://github.com/grafana/grafana/issues/12550)
+* **Graph**: Time regions support enabling highlight of weekdays and/or certain timespans [#5930](https://github.com/grafana/grafana/issues/5930)
 
 ### Minor