chore(deps): update dependency nunit to 4.6.0

Author: devlead

src/Directory.Packages.props

@@ -13,7 +13,7 @@
     <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="18.4.0" />
     <PackageVersion Include="MimeTypes" Version="2.5.2" />
     <PackageVersion Include="NuGetizer" Version="1.4.7" />
-    <PackageVersion Include="NUnit" Version="4.5.1" />
+    <PackageVersion Include="NUnit" Version="4.6.0" />
     <PackageVersion Include="NUnit.Analyzers" Version="4.12.0" />
     <PackageVersion Include="NUnit3TestAdapter" Version="6.2.0" />
     <PackageVersion Include="System.Linq.Async" Version="7.0.1" />