Update app.py

app.py

@@ -16,6 +16,7 @@ def tok_mod():
   tokenizer = GPT2Tokenizer.from_pretrained('distilgpt2')
   tokenizer.add_special_tokens({'pad_token': '[PAD]'})
   model = GPT2LMHeadModel.from_pretrained('FredZhang7/distilgpt2-stable-diffusion-v2')
+  model.to('cpu')
   return model,tokenizer