Bump xunit.runner.visualstudio from 2.5.7 to 2.8.1

Bumps [xunit.runner.visualstudio](https://github.com/xunit/visualstudio.xunit) from 2.5.7 to 2.8.1.
- [Release notes](https://github.com/xunit/visualstudio.xunit/releases)
- [Commits](xunit/visualstudio.xunit@2.5.7...2.8.1)

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

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

Directory.Packages.props

@@ -43,7 +43,7 @@
     <PackageVersion Include="RichardSzalay.MockHttp" Version="7.0.0" />
     <PackageVersion Include="System.Net.Http.Json" Version="8.0.0" />
     <PackageVersion Include="Xunit.Extensions.Logging" Version="1.1.0" />
-    <PackageVersion Include="xunit.runner.visualstudio" Version="2.5.7" PrivateAssets="All" />
+    <PackageVersion Include="xunit.runner.visualstudio" Version="2.8.1" PrivateAssets="All" />
     <PackageVersion Include="xunit" Version="2.7.0" />
   </ItemGroup>
 </Project>