Bump xunit from 2.5.0 to 2.6.1

Bumps [xunit](https://github.com/xunit/xunit) from 2.5.0 to 2.6.1.
- [Commits](xunit/xunit@2.5.0...2.6.1)

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

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

src/Tests.props

@@ -14,7 +14,7 @@
     </PackageReference>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.7.0" />
     <PackageReference Include="Shouldly" Version="4.2.1" />
-    <PackageReference Include="xunit" Version="2.5.0" />
+    <PackageReference Include="xunit" Version="2.6.1" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.4.5" />
     <PackageReference Include="Moq" Version="4.20.2" />
   </ItemGroup>