fix: update Program.cs to use top-level statements for vs-2022

[cmkaya]

This commit updates the structure of Program.cs for vs-2022 to use top-level statements, which is consistent with .NET 8.

Previously, the Program class was defined using the traditional way, which is not compatible with top-level statements.

[prmerger-automator]

@cmkaya : Thanks for your contribution! The author(s) have been notified to review your proposed change.

[learn-build-service-prod]

Learn Build status updates of commit 52e6ab4:

✅ Validation status: passed

File	Status	Preview URL	Details
docs/get-started/csharp/tutorial-console.md	✅Succeeded

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[ShannonLeavitt]

@anandmeg

Can you review the proposed changes?

IMPORTANT: When the changes are ready for publication, adding a #sign-off comment is the best way to signal that the PR is ready for the review team to merge.

#label:"aq-pr-triaged"
@MicrosoftDocs/public-repo-pr-review-team

[anandmeg]

The tutorial is updated for top-level statements in VS 2022. When you create a new C# console project in VS 2022, the default code is Console.WriteLine("Hello, World!");