update inference config

README.md

@@ -35,6 +35,6 @@ pipe.transformer = pipe.transformer.merge_and_unload()
 pipe = pipe.to(device)
 
 prompt = 'a photo of a black kite and a green bear'
-image = pipe(prompt, height=512, width=512, num_inference_steps=40,guidance_scale=4.5).images[0]  
+image = pipe(prompt, height=512, width=512, num_inference_steps=40,guidance_scale=4.5,negative_prompt="").images[0]  
 image.save(f"flow_grpo.png")
 ```