chore(deps): Bump xunit from 2.4.2 to 2.6.0

Bumps [xunit](https://github.com/xunit/xunit) from 2.4.2 to 2.6.0.
- [Commits](xunit/xunit@2.4.2...2.6.0)

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

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

test/Directory.Build.targets

@@ -19,7 +19,7 @@
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
-    <PackageReference Include="xunit" Version="2.4.2" />
+    <PackageReference Include="xunit" Version="2.6.0" />
   </ItemGroup>
 
   <ItemGroup Condition="'$(IsTestProject)' == 'true'">