Bump xunit.runner.visualstudio from 2.5.5 to 2.5.6

Bumps [xunit.runner.visualstudio](https://github.com/xunit/visualstudio.xunit) from 2.5.5 to 2.5.6.
- [Release notes](https://github.com/xunit/visualstudio.xunit/releases)
- [Commits](xunit/visualstudio.xunit@2.5.5...2.5.6)

---
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>

WebDriverManager.Tests/WebDriverManager.Tests.csproj

@@ -9,7 +9,7 @@
     <ItemGroup>
         <PackageReference Include="coverlet.msbuild" Version="6.0.0" />
         <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.8.0" />
-        <PackageReference Include="xunit.runner.visualstudio" Version="2.5.5" />
+        <PackageReference Include="xunit.runner.visualstudio" Version="2.5.6" />
         <PackageReference Include="Selenium.WebDriver" Version="4.16.2" />
         <PackageReference Include="xunit" Version="2.6.3" />
     </ItemGroup>