chore(deps): bump xunit.runner.visualstudio and Microsoft.TestPlatfor…

…m.ObjectModel

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

Updates `xunit.runner.visualstudio` from 2.3.1 to 2.8.1
- [Release notes](https://github.com/xunit/visualstudio.xunit/releases)
- [Commits](https://github.com/xunit/visualstudio.xunit/commits/2.8.1)

Updates `Microsoft.TestPlatform.ObjectModel` from 15.5.0 to 17.10.0
- [Release notes](https://github.com/microsoft/vstest/releases)
- [Changelog](https://github.com/microsoft/vstest/blob/main/docs/releases.md)
- [Commits](microsoft/vstest@v15.5.0...v17.10.0)

---
updated-dependencies:
- dependency-name: xunit.runner.visualstudio
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: Microsoft.TestPlatform.ObjectModel
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

test/Xunit.Xml.TestLogger.AcceptanceTests/Xunit.Xml.TestLogger.AcceptanceTests.csproj

@@ -21,7 +21,7 @@
 
   <ItemGroup>
     <PackageReference Include="xunit" Version="2.8.1" />
-    <PackageReference Include="xunit.runner.visualstudio" Version="2.3.1" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.8.1" />
   </ItemGroup>
 
   <!-- Build test assets for acceptance tests -->