Fix enforcing global vrouter config documentation

Change-Id: Icfe13f39879758bfe77989a8aa2553970cccb76f
diff --git a/README.rst b/README.rst
index 2f55b18..5f09362 100644
--- a/README.rst
+++ b/README.rst
@@ -939,7 +939,7 @@
     client:
       ...
       global_vrouter_config:
-        name: global-vrouter-config
+        name: default-global-vrouter-config
         parent_type: global-system-config
         encap_priority: "MPLSoUDP,MPLSoGRE"
         vxlan_vn_id_mode: automatic