Fix enter tower dungeons

src/main/java/emu/grasscutter/data/excels/TowerLevelData.java

@@ -8,6 +8,7 @@ public class TowerLevelData extends GameResource {
 	
     private int levelId;
     private int levelIndex;
+    private int levelGroupId;
     private int dungeonId;
 
     @Override
@@ -19,6 +20,10 @@ public class TowerLevelData extends GameResource {
         return levelId;
     }
 
+    public int getLevelGroupId() {
+        return levelGroupId;
+    }
+
     public int getLevelIndex() {
         return levelIndex;
     }