Bump the testing-frameworks group with 1 update

Bumps Microsoft.NET.Test.Sdk from 18.3.0 to 18.4.0

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

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

Author: dependabot[bot]

Directory.Packages.props

@@ -74,7 +74,7 @@
     <PackageVersion Include="Microsoft.Extensions.Logging.Console" Version="$(System10Version)" />
     <PackageVersion Include="Microsoft.Extensions.Options" Version="$(System10Version)" />
     <PackageVersion Include="Microsoft.Extensions.TimeProvider.Testing" Version="10.1.0" />
-    <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="18.3.0" />
+    <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="18.4.0" />
     <PackageVersion Include="Moq" Version="4.20.72" />
     <PackageVersion Include="OpenTelemetry" Version="1.15.1" />
     <PackageVersion Include="OpenTelemetry.Exporter.InMemory" Version="1.15.1" />