Bump xunit from 2.8.0 to 2.9.0 (#64)

Bumps xunit from 2.8.0 to 2.9.0.

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

tests/Immediate.Apis.Tests/Directory.Packages.props

@@ -31,7 +31,7 @@
 	<PackageVersion Include="System.Threading.Tasks.Extensions" Version="4.5.4" />
 	<PackageVersion Include="Verify.SourceGenerators" Version="2.2.0" />
 	<PackageVersion Include="Verify.Xunit" Version="24.2.0" />
-	<PackageVersion Include="xunit" Version="2.8.0" />
+	<PackageVersion Include="xunit" Version="2.9.0" />
 	<PackageVersion Include="xunit.runner.visualstudio" Version="2.8.0" />
   </ItemGroup>
 </Project>