Fix 1.20 REntity

SpigotCore_Main/src/de/steamwar/entity/REntity.java

@@ -139,7 +139,7 @@ public class REntity {
     }
 
     private static final Class<?> animationPacket = Reflection.getClass("{nms.network.protocol.game}.PacketPlayOutAnimation");
-    private static final Reflection.FieldAccessor<Integer> animationEntity = Reflection.getField(animationPacket, int.class, Core.getVersion() > 15 ? 6 : 0);
+    private static final Reflection.FieldAccessor<Integer> animationEntity = Reflection.getField(animationPacket, int.class, Core.getVersion() > 15 ? (Core.getVersion() > 19 ? 5 : 6) : 0);
     private static final Reflection.FieldAccessor<Integer> animationAnimation = Reflection.getField(animationPacket, int.class, Core.getVersion() > 15 ? (Core.getVersion() > 19 ? 6 : 7) : 1);
     public void showAnimation(byte animation) {
         Object packet = Reflection.newInstance(animationPacket);