chore(deps): 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>

Author: dependabot[bot]

tests/Microsoft.Graph.DotnetCore.Core.Test/Microsoft.Graph.DotnetCore.Core.Test.csproj

@@ -19,7 +19,7 @@
     <PackageReference Include="System.Reflection.Emit" Version="4.7.0">
       <ExcludeAssets>all</ExcludeAssets>
     </PackageReference>
-    <PackageReference Include="xunit.runner.visualstudio" Version="2.8.0">
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.8.1">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>