nuget: bump NUnit3TestAdapter from 4.1.0 to 4.6.0

Bumps [NUnit3TestAdapter](https://github.com/nunit/nunit3-vs-adapter) from 4.1.0 to 4.6.0.
- [Release notes](https://github.com/nunit/nunit3-vs-adapter/releases)
- [Commits](https://github.com/nunit/nunit3-vs-adapter/compare/V4.1.0...V4.6.0)

---
updated-dependencies:
- dependency-name: NUnit3TestAdapter
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Directory.Packages.props

@@ -26,7 +26,7 @@
     <PackageVersion Include="MsgPack.Cli" Version="1.0.1" />
     <PackageVersion Include="NetCoreServer" Version="7.0.0" />
     <PackageVersion Include="NUnit" Version="3.13.3" />
-    <PackageVersion Include="NUnit3TestAdapter" Version="4.1.0" />
+    <PackageVersion Include="NUnit3TestAdapter" Version="4.6.0" />
     <PackageVersion Include="OpenTK.Core" Version="4.8.1" />
     <PackageVersion Include="OpenTK.Graphics" Version="4.8.1" />
     <PackageVersion Include="OpenTK.Audio.OpenAL" Version="4.8.1" />