Bump xunit from 2.4.1 to 2.5.2 in /c-sharp/Check.Tests

Bumps [xunit](https://github.com/xunit/xunit) from 2.4.1 to 2.5.2.
- [Commits](xunit/xunit@2.4.1...2.5.2)

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

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

c-sharp/Check.Tests/Check.Tests.csproj

@@ -7,7 +7,7 @@
 
   <ItemGroup> 
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.9.4" />
-    <PackageReference Include="xunit" Version="2.4.1" />
+    <PackageReference Include="xunit" Version="2.5.2" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.4.3">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
       <PrivateAssets>all</PrivateAssets>