Bump xunit.runner.visualstudio from 2.5.8 to 2.8.0

Bumps [xunit.runner.visualstudio](https://github.com/xunit/visualstudio.xunit) from 2.5.8 to 2.8.0.
- [Release notes](https://github.com/xunit/visualstudio.xunit/releases)
- [Commits](xunit/visualstudio.xunit@2.5.8...2.8.0)

---
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>

tests/Chisel.Tests/Chisel.Tests.csproj

@@ -16,7 +16,7 @@
     <PackageReference Include="Verify.Xunit" Version="24.1.0" />
     <PackageReference Include="xunit" Version="2.7.1" />
     <PackageReference Include="Xunit.Combinatorial" Version="1.6.24" />
-    <PackageReference Include="xunit.runner.visualstudio" Version="2.5.8" PrivateAssets="all" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.8.0" PrivateAssets="all" />
   </ItemGroup>
 
   <ItemGroup>