Added examples for WAF create and update

Author: briantkim-msft

src/nginx/azext_nginx/_help.py

@@ -15,13 +15,13 @@
     short-summary: Command to create an Nginx Deployment WAF Policy.
     examples:
         - name: Create a WAF policy for a Nginx deployment
-        - text: az nginx deployment waf-policy create --name mypolicyname --deployment-name mydeploymentname --resource-group myresourcegroupname --filepath /path/to/my/policy.json --content mycontentfileinbase64encoding
+          text: az nginx deployment waf-policy create --name mypolicyname --deployment-name mydeploymentname --resource-group myresourcegroupname --filepath /path/to/my/policy.json --content mycontentfileinbase64encoding
 """
 
 helps['nginx deployment waf-policy update'] = """
     type: command
     short-summary: Command to update an Nginx Deployment WAF Policy.
     examples:
         - name: Update a WAF policy for a Nginx deployment
-        - text: az nginx deployment waf-policy update --name mypolicyname --deployment-name mydeploymentname --resource-group myresourcegroupname --filepath /path/to/my/policy.json --content mycontentfileinbase64encoding
+          text: az nginx deployment waf-policy update --name mypolicyname --deployment-name mydeploymentname --resource-group myresourcegroupname --filepath /path/to/my/policy.json --content mycontentfileinbase64encoding
 """