chore(deps): update actions/setup-dotnet action to v4

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
actions/setup-dotnet	action	major	v3 -> v4

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Release Notes

actions/setup-dotnet (actions/setup-dotnet)

### [`v4`](https://togithub.com/actions/setup-dotnet/compare/v3...v4) [Compare Source](https://togithub.com/actions/setup-dotnet/compare/v3...v4)

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[github-actions[bot]]

This is addressed in release v2.1.2.