Update checking-mco-node-status.adoc

In the Red Hat official documentation, the "oc describe" command has "-o yaml" in the end. This "-o yaml" should not be there in the "oc describe" command.

Currently the command in the document is : oc describe machineconfignode/<machine_config_node_name> -o yaml

The correct Command is : oc describe machineconfignode/<machine_config_node_name>

Author: s-dharma

modules/checking-mco-node-status.adoc

@@ -142,7 +142,7 @@ For more details on the update status, you can use the `oc describe machineconfi
 
 [source,terminal]
 ----
-$ oc describe machineconfignode/<machine_config_node_name> -o yaml
+$ oc describe machineconfignode/<machine_config_node_name>
 ----
 
 .Example output