Bump Microsoft.NET.Test.Sdk from 18.5.1 to 18.6.0

---
updated-dependencies:
- dependency-name: Microsoft.NET.Test.Sdk
  dependency-version: 18.6.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

Directory.Packages.props

@@ -55,7 +55,7 @@
     <PackageVersion Include="Microsoft.Extensions.Http" Version="10.0.8" />
     <PackageVersion Include="Microsoft.Extensions.Http.Resilience" Version="10.6.0" />
     <PackageVersion Include="Microsoft.AspNetCore.Mvc.Testing" 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="Microsoft.Web.LibraryManager.Build" Version="2.1.175" />-->
     <PackageVersion Include="ModelContextProtocol" Version="1.2.0" />
     <PackageVersion Include="ModelContextProtocol.AspNetCore" Version="1.3.0" />