Update MongoDB tutorial metadata after content review (#36122)

* Initial plan

* Add version compatibility warnings and troubleshooting for MongoDB tutorial JSON serialization errors

Co-authored-by: wadepickett <10985336+wadepickett@users.noreply.github.com>

* Enhance troubleshooting sections with comprehensive guidance for JSON serialization issues

Co-authored-by: wadepickett <10985336+wadepickett@users.noreply.github.com>

* Revert content changes and only update ms.date metadata as requested in issue analysis

Co-authored-by: wadepickett <10985336+wadepickett@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: wadepickett <10985336+wadepickett@users.noreply.github.com>

Author: Copilot

aspnetcore/tutorials/first-mongo-app.md

@@ -6,7 +6,7 @@ description: This tutorial demonstrates how to create an ASP.NET Core web API us
 monikerRange: '>= aspnetcore-3.1'
 ms.author: wpickett
 ms.custom: mvc, sfi-ropc-nochange
-ms.date: 04/09/2025
+ms.date: 09/17/2025
 uid: tutorials/first-mongo-app
 ---
 # Create a web API with ASP.NET Core and MongoDB