Minor refactoring/order for the IEventBus interface

Author: CESARDELATORRE

src/BuildingBlocks/EventBus/EventBus/Abstractions/IEventBus.cs

@@ -5,9 +5,12 @@ namespace Microsoft.eShopOnContainers.BuildingBlocks.EventBus.Abstractions
 {
     public interface IEventBus
     {
+        void Publish(IntegrationEvent @event);
+
         void Subscribe<T, TH>()
             where T : IntegrationEvent
             where TH : IIntegrationEventHandler<T>;
+
         void SubscribeDynamic<TH>(string eventName)
             where TH : IDynamicIntegrationEventHandler;
 
@@ -17,7 +20,5 @@ void UnsubscribeDynamic<TH>(string eventName)
         void Unsubscribe<T, TH>()
             where TH : IIntegrationEventHandler<T>
             where T : IntegrationEvent;
-
-        void Publish(IntegrationEvent @event);
     }
 }