Fix code analysis

src/AspNetCore/WebApi/src/Asp.Versioning.Http/DependencyInjection/IServiceCollectionExtensions.cs

@@ -282,5 +282,7 @@ private static void TryAddErrorObjectJsonOptions( IServiceCollection services )
         }
     }
 
+// TEMP: this is a marker class to test whether Error Objects have been explicitly added. remove in 9.0+
+#pragma warning disable CA1812 // Avoid uninstantiated internal classes
     private sealed class ErrorObjectsAdded { }
 }