Fixing docs , a brace is out of code section (#931)

A closing brace is out of code section and appears before the description paragraph after JSON code sample.

docs/features/kubernetes.rst

@@ -54,6 +54,7 @@ kubernetes service name. We also need to set up the ServiceDiscoveryProvider in
     }
   }
 }
+    
 Service deployment in Namespace Dev , ServiceDiscoveryProvider type is kube, you also can set pollkube ServiceDiscoveryProvider type.
   Note: Host、 Port and Token are no longer in use。