chore: Update dependency NUnit3TestAdapter to v6

Author: renovate-bot

Directory.Packages.props

@@ -31,7 +31,7 @@
   <ItemGroup Label="NuGet Package Reference Versions">
     <PackageVersion Include="Nerdbank.GitVersioning" Version="3.8.118" />
     <PackageVersion Include="NUnit" Version="4.4.0" />
-    <PackageVersion Include="NUnit3TestAdapter" Version="5.2.0" />
+    <PackageVersion Include="NUnit3TestAdapter" Version="6.0.1" />
     <PackageVersion Include="Microsoft.CodeAnalysis.Analyzers" Version="3.11.0" />
     <PackageVersion Include="Microsoft.CodeAnalysis.Analyzer.Testing" Version="1.1.2" />
     <PackageVersion Include="Microsoft.CodeAnalysis.CodeFix.Testing" Version="1.1.2" />