Bump xunit from 2.8.1 to 2.9.3

Bumps [xunit](https://github.com/xunit/xunit) from 2.8.1 to 2.9.3.
- [Commits](xunit/xunit@v2-2.8.1...v2-2.9.3)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

Directory.Build.props

@@ -21,7 +21,7 @@
     <LibraryFramework>netstandard2.0</LibraryFramework>
     <NetLibraryFramework>net6.0</NetLibraryFramework>
     <TestsNetCoreFramework>net8.0</TestsNetCoreFramework>
-    <XunitVersion>2.8.1</XunitVersion>
+    <XunitVersion>2.9.3</XunitVersion>
     <TestSdkVersion>17.11.1</TestSdkVersion>
     <CoverletVersion>6.0.3</CoverletVersion>
     <XunitRunneVisualstudio>2.8.1</XunitRunneVisualstudio>