update readme

README.md

@@ -238,7 +238,7 @@ image = pipe(
     width=2048,
     height=2048,
     use_reprompt=True,  # Enable prompt enhancement
-    use_refiner=False,  # Disable refiner model, enable it to achieve higher image quality.
+    use_refiner=True,  # Enable refiner model
     # For the distilled model, use 8 steps for faster inference.
     # For the non-distilled model, use 50 steps for better quality
     num_inference_steps=8 if "distilled" in model_name else 50, 

README_CN.md

@@ -211,7 +211,7 @@ image = pipe(
     width=2048,
     height=2048,
     use_reprompt=True,  # 启用提示词增强
-    use_refiner=False,  # 关闭精修模型, 可开启以获得更高画质
+    use_refiner=True,  # 启用精修模型, 以获得更高画质
     # 对于蒸馏版模型，建议使用 8 步以加快推理速度；
     # 对于非蒸馏版模型，建议使用 50 步以获得更高画质
     num_inference_steps=8 if "distilled" in model_name else 50,