dep: Update actions/setup-dotnet action to v3

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
actions/setup-dotnet	action	major	v2 -> v3

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Release Notes

actions/setup-dotnet

### [`v3`](https://togithub.com/actions/setup-dotnet/compare/v2...v3) [Compare Source](https://togithub.com/actions/setup-dotnet/compare/v2...v3)

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