refactor: .NET 8 migration

opserver / Opserver

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https://opserver.github.io/Opserver/

MIT License

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Open itssimple opened 10 months ago

itssimple commented 10 months ago

Updated .NET to 8.0
Updated CI-steps/actions to more recent version
Updated NuGet-packages to latest available version
- Fixed deprecation warnings after package upgrades