Potentially improve migration.

backend/tools/Migrate_01/OldEvents/ContentUpdateProposed.cs

@@ -8,6 +8,7 @@
 using System;
 using Squidex.Domain.Apps.Core.Contents;
 using Squidex.Domain.Apps.Events;
+using Squidex.Domain.Apps.Events.Contents;
 using Squidex.Infrastructure.EventSourcing;
 using Squidex.Infrastructure.Migrations;
 using Squidex.Infrastructure.Reflection;
@@ -22,7 +23,7 @@ namespace Migrate_01.OldEvents
 
         public IEvent Migrate()
         {
-            return SimpleMapper.Map(this, new NoopConventEvent());
+            return SimpleMapper.Map(this, new ContentUpdated());
         }
     }
 }