Bump NUnit.Analyzers (#44260)

Bumps the dotnet group in /docs/core/testing/snippets/order-unit-tests/csharp/NUnit.TestProject with 1 update: [NUnit.Analyzers](https://github.com/nunit/nunit.analyzers).


Updates `NUnit.Analyzers` from 4.5.0 to 4.6.0
- [Release notes](https://github.com/nunit/nunit.analyzers/releases)
- [Changelog](https://github.com/nunit/nunit.analyzers/blob/master/CHANGES.md)
- [Commits](nunit/nunit.analyzers@4.5.0...4.6.0)

---
updated-dependencies:
- dependency-name: NUnit.Analyzers
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: dotnet
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]