fix example code

import torch before using it

README.md

@@ -34,6 +34,7 @@ import requests
 
 from PIL import Image
 from transformers import AutoProcessor, AutoModelForCausalLM 
+import torch
 
 device = "cuda:0" if torch.cuda.is_available() else "cpu"
 torch_dtype = torch.float16 if torch.cuda.is_available() else torch.float32