changelog: add notes about closing #12506

[skip ci]

CHANGELOG.md

@@ -14,6 +14,7 @@
 * **Postgres/MySQL/MSSQL**: Use floor rounding in $__timeGroup macro function [#12460](https://github.com/grafana/grafana/issues/12460), thx [@svenklemm](https://github.com/svenklemm)
 * **MySQL/MSSQL**: Use datetime format instead of epoch for $__timeFilter, $__timeFrom and $__timeTo macros [#11618](https://github.com/grafana/grafana/issues/11618) [#11619](https://github.com/grafana/grafana/issues/11619), thx [@AustinWinstanley](https://github.com/AustinWinstanley)
 * **Github OAuth**: Allow changes of user info at Github to be synched to Grafana when signing in [#11818](https://github.com/grafana/grafana/issues/11818), thx [@rwaweber](https://github.com/rwaweber)
+* **Dashboard**: Dashboard links not updated when changing variables [#12506](https://github.com/grafana/grafana/issues/12506)
 
 
 # 5.2.1 (2018-06-29)