build(deps): bump Roslynator.Analyzers from 3.0.0 to 3.1.0 in /Sample (…

…#337)

Bumps [Roslynator.Analyzers](https://github.com/JosefPihrt/Roslynator) from 3.0.0 to 3.1.0.
- [Release notes](https://github.com/JosefPihrt/Roslynator/releases)
- [Changelog](https://github.com/JosefPihrt/Roslynator/blob/master/ChangeLog.md)
- [Commits](dotnet/roslynator@v3.0.0...v3.1.0)

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