Update introduction for 401 Unauthorized error article

Revised introduction to clarify guidance on troubleshooting 401 Unauthorized errors in ASP.NET Core Web API with Microsoft Entra ID.

Author: JarrettRenshaw

support/entra/entra-id/app-integration/401-unauthorized-aspnet-core-web-api.md

@@ -9,7 +9,9 @@ ms.custom: sap:Developing or Registering apps with Microsoft identity platform
 
 # 401 Unauthorized errors in ASP.NET Core Web API with Microsoft Entra ID 
 
-When you call an ASP.NET Core Web API that's secured by using Microsoft Entra ID authentication, you might encounter a "401 Unauthorized" error. This article provides guidance for using `JwtBearerEvents` to capture detailed logs to troubleshoot these errors.
+## Summary
+
+This article provides guidance for using JwtBearerEvents to capture detailed logs to troubleshoot a "401 Unauthorized" error when you call an ASP.NET Core Web API that's secured by using Microsoft Entra ID authentication.
 
 ## Symptoms