Bump Microsoft.NET.Test.Sdk in /src in the tests group

Bumps the tests group in /src with 1 update: [Microsoft.NET.Test.Sdk](https://github.com/microsoft/vstest).


Updates `Microsoft.NET.Test.Sdk` from 17.12.0 to 17.13.0
- [Release notes](https://github.com/microsoft/vstest/releases)
- [Changelog](https://github.com/microsoft/vstest/blob/main/docs/releases.md)
- [Commits](microsoft/vstest@v17.12.0...v17.13.0)

---
updated-dependencies:
- dependency-name: Microsoft.NET.Test.Sdk
  dependency-version: 17.13.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: tests
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

src/Directory.Packages.props

@@ -15,7 +15,7 @@
     <PackageVersion Include="IDisposableAnalyzers" Version="4.0.8" />
     <PackageVersion Include="Microsoft.CodeAnalysis.NetAnalyzers" Version="9.0.0" />
     <PackageVersion Include="Microsoft.Extensions.DependencyInjection" Version="9.0.3" />
-    <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="17.12.0" />
+    <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="17.13.0" />
     <PackageVersion Include="Microsoft.SourceLink.GitHub" Version="8.0.0" />
     <PackageVersion Include="NGitLab" Version="8.3.0" />
     <PackageVersion Include="NSubstitute" Version="5.3.0" />