Generate async files

Author: github-actions[bot]

src/NHibernate/Async/Event/Default/DefaultRefreshEventListener.cs

@@ -14,6 +14,7 @@
 using NHibernate.Cache;
 using NHibernate.Engine;
 using NHibernate.Impl;
+using NHibernate.Intercept;
 using NHibernate.Persister.Entity;
 using NHibernate.Type;
 using NHibernate.Util;