Bump xunit.runner.visualstudio from 2.8.0 to 2.8.1

Bumps [xunit.runner.visualstudio](https://github.com/xunit/visualstudio.xunit) from 2.8.0 to 2.8.1.
- [Release notes](https://github.com/xunit/visualstudio.xunit/releases)
- [Commits](xunit/visualstudio.xunit@2.8.0...2.8.1)

---
updated-dependencies:
- dependency-name: xunit.runner.visualstudio
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Directory.Packages.props

@@ -15,7 +15,7 @@
         <PackageVersion Include="Microsoft.Build.Locator" Version="1.6.10" />
         <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="17.10.0" />
         <PackageVersion Include="xunit" Version="2.8.1" />
-        <PackageVersion Include="xunit.runner.visualstudio" Version="2.8.0" />
+        <PackageVersion Include="xunit.runner.visualstudio" Version="2.8.1" />
         <PackageVersion Include="coverlet.collector" Version="6.0.2" />
         <PackageVersion Include="ConsoleAppFramework" Version="4.2.4" />
         <PackageVersion Include="MessagePack" Version="2.5.140" />