Missed Outbox Storage registration for sql server outbox

src/TbdDevelop.Mediator.Outbox.SqlServer/Extensions/MediatorOutboxConfigurationBuilderExtensions.cs

@@ -20,6 +20,7 @@ public static MediatorOutboxConfigurationBuilder UseSqlServerOutbox(this Mediato
             });
 
             services.AddTransient<IOutbox, SqlServerNotificationOutbox>();
+            services.AddTransient<IOutboxStorage, SqlServerOutboxStorage>();
         });
 
         return builder;