note format correction

Author: halkazwini

articles/web-application-firewall/afds/waf-front-door-captcha.md

@@ -11,7 +11,8 @@ ms.date: 04/29/2025
 
 # Azure Front Door Web Application Firewall CAPTCHA (preview)
 
-Web Application Firewall CAPTCHA on Azure Frond Door is currently in PREVIEW. See the [Supplemental Terms of Use for Microsoft Azure Previews](https://azure.microsoft.com/support/legal/preview-supplemental-terms/) for legal terms that apply to Azure features that are in beta, preview, or otherwise not yet released into general availability.
+> [!IMPORTANT]
+> Web Application Firewall CAPTCHA on Azure Frond Door is currently in PREVIEW. See the [Supplemental Terms of Use for Microsoft Azure Previews](https://azure.microsoft.com/support/legal/preview-supplemental-terms/) for legal terms that apply to Azure features that are in beta, preview, or otherwise not yet released into general availability.
 
 Azure Web Application Firewall (WAF) offers a CAPTCHA feature designed to differentiate human users from automated bots. This interactive challenge requires suspected traffic to complete a CAPTCHA test, blocking malicious automated requests while allowing legitimate users to proceed seamlessly. As a result, WAF helps protect applications from bot-driven attacks, including brute-force attempts and account takeover risks.