Refactor GPU decorator usage in generate_item_image function

app.py

@@ -52,7 +52,7 @@ Focus on the item itself, ensuring it is fully described, and specify a plain, w
 
     return object_t2i_prompt
 
-@spaces.GPU(duration=100)
+@spaces.GPU
 def generate_item_image(object_t2i_prompt):
     image = pipe(prompt=object_t2i_prompt, guidance_scale=3.5, num_inference_steps=28, width=1024, height=1024, generator=torch.Generator("cpu").manual_seed(0), output_type="pil").images[0]
     trial_id, processed_image = preprocess_pil_image(image)