Bump Microsoft.NET.Test.Sdk from 18.3.0 to 18.4.0 (#19)

---
updated-dependencies:
- dependency-name: Microsoft.NET.Test.Sdk
  dependency-version: 18.4.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Author: dependabot[bot]

Directory.Packages.props

@@ -25,7 +25,7 @@
     <PackageVersion Include="Microsoft.Extensions.DependencyInjection" Version="10.0.5" />
     <PackageVersion Include="Microsoft.Extensions.FileSystemGlobbing" Version="10.0.5" />
     <PackageVersion Include="Microsoft.Extensions.Hosting" Version="10.0.5" />
-    <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="18.3.0" />
+    <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="18.4.0" />
     <PackageVersion Include="ModelContextProtocol" Version="1.1.0" />
     <PackageVersion Include="Moq" Version="4.20.72" />
     <PackageVersion Include="Moq.AutoMock" Version="4.0.1" />