Update dependency Microsoft.NET.Test.Sdk to 18.6.0 (#352)

Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

Directory.Packages.props

@@ -18,7 +18,7 @@
     <PackageVersion Include="Microsoft.Extensions.Hosting.Abstractions" Version="10.0.8" />
     <PackageVersion Include="Microsoft.Extensions.Options.ConfigurationExtensions" Version="10.0.8" />
     <PackageVersion Include="Microsoft.Extensions.Options.DataAnnotations" Version="10.0.8" />
-    <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="18.5.1" />
+    <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="18.6.0" />
     <PackageVersion Include="MinVer" Version="7.0.0" />
     <PackageVersion Include="MSTest.TestAdapter" Version="4.2.3" />
     <PackageVersion Include="MSTest.TestFramework" Version="4.2.3" />