Fix exception while loading dynasty houses from CK3 (#1982) #patch

Sentry event ID: ace81263d6e2427582c49a054e630d4c

ImperatorToCK3/CK3/Dynasties/HouseCollection.cs

@@ -7,7 +7,7 @@
 
 namespace ImperatorToCK3.CK3.Dynasties;
 
-public class HouseCollection : IdObjectCollection<string, House> {
+public class HouseCollection : ConcurrentIdObjectCollection<string, House> {
 	public void LoadCK3Houses(ModFilesystem ck3ModFS) {
 		Logger.Info("Loading dynasty houses from CK3...");