Update application-gateway-customize-waf-rules-portal.md

Author: vhorne

articles/web-application-firewall/ag/application-gateway-customize-waf-rules-portal.md

@@ -7,7 +7,7 @@ ms.service: web-application-firewall
 ms.date: 11/07/2022
 ms.author: victorh
 ms.topic: article
-ms.custom FY23-content-maintenance
+ms.custom: FY23-content-maintenance
 ---
 
 # Customize Web Application Firewall rules using the Azure portal