Fix missing base method call in ApplyOptions implementation

The `ApplyOptions` method now correctly calls the base implementation before applying custom configurations. This ensures that any base behavior is preserved, preventing potential issues with serialization options.

src/modules/Elsa.Workflows.Core/Serialization/Serializers/JsonWorkflowStateSerializer.cs

@@ -138,6 +138,7 @@ public class JsonWorkflowStateSerializer : ConfigurableSerializer, IWorkflowStat
 
     public override void ApplyOptions(JsonSerializerOptions options)
     {
+        base.ApplyOptions(options);
         options.ReferenceHandler = new PerCallReferenceHandlerWrapper();
     }