update flag

docs/sources/tempo/metrics-generator/service_graphs/_index.md

@@ -73,13 +73,13 @@ Duration is measured both from the client and the server sides.
 
 Possible values for `connection_type`: unset, `virtual_node`, `messaging_system`, or `database`.
 
-Additional labels can be included using the `dimensions` configuration option, or the `enable_extra_uninstrumented_services_label` option.
+Additional labels can be included using the `dimensions` configuration option, or the `enable_virtual_node_label` option.
 
 Since the service graph processor has to process both sides of an edge,
 it needs to process all spans of a trace to function properly.
 If spans of a trace are spread out over multiple instances, spans are not paired up reliably.
 
-#### Activate `enable_extra_uninstrumented_services_label`
+#### Activate `enable_virtual_node_label`
 
 Activating this feature adds the following label and corresponding values: