fix broken link (grafana#663)

* fix broken link

* Update documentation/datasources.md

Co-authored-by: Hubert Stefanski <35736504+HubertStefanski@users.noreply.github.com>

Co-authored-by: Hubert Stefanski <35736504+HubertStefanski@users.noreply.github.com>

documentation/datasources.md

@@ -15,7 +15,7 @@ The following properties are accepted in the `spec`:
 * *name*: The filename of the data source that gets mounted into a volume in the grafana instance. Not to be confused
   with `metadata.name`.
 * *datasources*: A list of data source definitions. Check
-  the [official documentation](https://grafana.com/docs/features/datasources/).
+  the [official documentation](https://grafana.com/docs/grafana/latest/datasources/).
 
 A data source accepts all properties
 listed [here](https://grafana.com/docs/administration/provisioning/#example-datasource-config-file), but does not