Fix SDK version

[ErikEJ]

fixes #331

[ErikEJ]

@roji FYI

[Copilot]

Pull Request Overview

This PR fixes the .NET SDK version configuration by correcting an invalid version number and updating the GitHub workflow to rely on the global.json file for SDK version specification.

• Updates the SDK version from an invalid format to a proper .NET 10 release candidate version
• Removes explicit SDK version specification from the GitHub workflow to use global.json instead

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
global.json	Corrects invalid SDK version number from "10.0.0" to "10.0.100"
.github/workflows/build.yml	Removes explicit dotnet-version to use global.json configuration

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[roji]

Ah yes, makes sense...