Bump xunit.runner.visualstudio from 3.1.5 to 4.0.0

---
updated-dependencies:
- dependency-name: xunit.runner.visualstudio
  dependency-version: 4.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

Directory.Packages.props

@@ -3,7 +3,7 @@
     <ManagePackageVersionsCentrally>true</ManagePackageVersionsCentrally>
     <!-- Test stack -->
     <XunitVersion>2.9.3</XunitVersion>
-    <XunitRunnerVersion>3.1.5</XunitRunnerVersion>
+    <XunitRunnerVersion>4.0.0</XunitRunnerVersion>
     <!-- Sample stack -->
     <AspNetCoreVersion>8.0.27</AspNetCoreVersion>
   </PropertyGroup>