Bump Microsoft.NET.Test.Sdk and Microsoft.TestPlatform.ObjectModel

Bumps [Microsoft.NET.Test.Sdk](https://github.com/microsoft/vstest) and [Microsoft.TestPlatform.ObjectModel](https://github.com/microsoft/vstest). These dependencies needed to be updated together.

Updates `Microsoft.NET.Test.Sdk` from 17.4.1 to 17.9.0
- [Release notes](https://github.com/microsoft/vstest/releases)
- [Changelog](https://github.com/microsoft/vstest/blob/main/docs/releases.md)
- [Commits](microsoft/vstest@v17.4.1...v17.9.0)

Updates `Microsoft.TestPlatform.ObjectModel` from 17.4.1 to 17.9.0
- [Release notes](https://github.com/microsoft/vstest/releases)
- [Changelog](https://github.com/microsoft/vstest/blob/main/docs/releases.md)
- [Commits](microsoft/vstest@v17.4.1...v17.9.0)

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

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

src/NuDoq.Tests/NuDoq.Tests.csproj

@@ -12,8 +12,8 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.4.1" />
-    <PackageReference Include="Microsoft.TestPlatform.ObjectModel" Version="17.4.1" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.9.0" />
+    <PackageReference Include="Microsoft.TestPlatform.ObjectModel" Version="17.9.0" />
     <PackageReference Include="System.Net.Http" Version="4.3.4" />
     <PackageReference Include="xunit" Version="2.4.2" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.4.5" />