whats new: provisioning for alert notifiers

docs/sources/guides/whats-new-in-v6-0.md

@@ -66,6 +66,10 @@ One of the goals of the Grafana v6.0 release is to add support for the three maj
 
 The Azure Monitor datasource integrates four Azure services with Grafana - Azure Monitor, Azure Log Analytics, Azure Application Insights and Azure Application Insights Analytics.
 
+### Provisioning support for alert notifiers
+
+Grafana now added support for provisioning alert notifiers from configuration files. Allowing operators to provision notifiers without using the UI or the API. A new field called `uid` has been introduced which is a string identifier that the administrator can set themselves. Same kind of identifier used for dashboards since v5.0. This feature makes it possible to use the same notifier configuration in multiple environments and refer to notifiers in dashboard json by a string identifier instead of the numeric id which depends on insert order and how many notifiers that exists in the instance.
+
 ### Other features
 
 - The ElasticSearch datasource now supports [bucket script pipeline aggregations](https://www.elastic.co/guide/en/elasticsearch/reference/current/search-aggregations-pipeline-bucket-script-aggregation.html). This gives the ability to do per bucket computations like the difference or ratio between two metrics.