Update a code section

Author: mumian

articles/azure-resource-manager/bicep/diagnostics/bcp201.md

@@ -39,7 +39,8 @@ param kubeConfig string
 extension kubernetes with {
   namespace: 'default'
   kubeConfig: kubeConfig
-} as k8s```
+} as k8s
+```
 
 For more information, see [Bicep extension](../bicep-extension.md).