nuget: switch NuGetUpdater target framework to net10.0

[JamieMagee]

What are you trying to accomplish?

The SDK was already at 10.0 but the project still targeted net9.0, so this catches the target framework up and pulls in the latest SupportedFrameworks.cs (which adds the browser platform TFMs upstream missed locally).

Anything you want to highlight for special attention from reviewers?

The test files still reference net9.0 in their fixture data -- that's intentional since those represent projects Dependabot is analyzing, not the tool itself.

How will you know you've accomplished your goal?

CI builds green; dotnet build NuGetUpdater.sln compiles with zero errors on net10.0.

Checklist

• I have run the complete test suite to ensure all tests and linters pass.
• I have thoroughly tested my code changes to ensure they work as expected, including adding additional tests for new functionality.
• I have written clear and descriptive commit messages.
• I have provided a detailed description of the changes in the pull request, including the problem it addresses, how it fixes the problem, and any relevant details about the implementation.
• I have ensured that the code is well-documented and easy to understand.

[Copilot]

Pull request overview

Updates the NuGetUpdater native helper to target .NET 10 (matching the already-updated SDK) and syncs the supported TFM list with upstream, including newly added *-browser TFMs.

Changes:

• Bump NuGetUpdater common target framework from net9.0 to net10.0.
• Update helper build script to publish the CLI for net10.0.
• Add net8.0-browser, net9.0-browser, and net10.0-browser to the supported frameworks list.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
nuget/helpers/lib/NuGetUpdater/NuGetUpdater.Core/FrameworkChecker/SupportedFrameworks.cs	Adds browser platform TFMs for net8/net9/net10 and includes them in the supported framework list.
nuget/helpers/lib/NuGetUpdater/Directory.Common.props	Updates CommonTargetFramework to net10.0 for the NuGetUpdater solution.
nuget/helpers/build	Publishes NuGetUpdater.Cli targeting net10.0.