docs: added versions_to_keep to config docs, #9671

docs/sources/installation/configuration.md

@@ -87,7 +87,7 @@ command line in the init.d script or the systemd service file.  It can
 be overridden in the configuration file or in the default environment variable
 be overridden in the configuration file or in the default environment variable
 file.
 file.
 
 
-### plugins 
+### plugins
 
 
 Directory where grafana will automatically scan and look for plugins
 Directory where grafana will automatically scan and look for plugins
 
 
@@ -624,6 +624,12 @@ Analytics ID here. By default this feature is disabled.
 
 
 <hr />
 <hr />
 
 
+## [dashboards]
+
+### versions_to_keep (introduced in v5.0)
+
+Number dashboard versions to keep (per dashboard). Default: 20, Minimum: 1.
+
 ## [dashboards.json]
 ## [dashboards.json]
 
 
 If you have a system that automatically builds dashboards as json files you can enable this feature to have the
 If you have a system that automatically builds dashboards as json files you can enable this feature to have the