update threads to 1.15.1

src/main/java/carpet/script/value/NBTSerializableValue.java

@@ -139,7 +139,7 @@ public class NBTSerializableValue extends Value implements ContainerValueInterfa
             if (blockEntity instanceof Inventory) {
                 inventory = (Inventory)blockEntity;
                 if (inventory instanceof ChestBlockEntity && block instanceof ChestBlock) {
-                    inventory = ChestBlock.getInventory(blockState, world, blockPos, true);
+                    inventory = ChestBlock.getInventory((ChestBlock)block, blockState, world, blockPos, true);
                 }
             }
         }