Update index.md

Fixed ms.date format which requires 2 digit month

Author: wadepickett

aspnetcore/migration/fx-to-core/areas/index.md

@@ -3,7 +3,7 @@ title: Complex migration scenarios - Deep dive areas
 description: Detailed guidance for complex ASP.NET Framework to ASP.NET Core migration scenarios
 author: twsouthwick
 ms.author: tasou
-ms.date: 6/20/2025
+ms.date: 07/16/2025
 uid: migration/fx-to-core/areas
 ---
 # Technology specific guidance