Update Postive_magic as a dict from list

Postive_magic is a dict with en/cn mapping to prompt enhancement. It was written as a list causing syntax errors.

README.md

@@ -55,10 +55,10 @@ else:
 pipe = DiffusionPipeline.from_pretrained(model_name, torch_dtype=torch_dtype)
 pipe = pipe.to(device)
 
-positive_magic = [
+positive_magic = {
     "en": "Ultra HD, 4K, cinematic composition." # for english prompt,
     "zh": "超清，4K，电影级构图" # for chinese prompt,
-]
+}
 
 # Generate image
 prompt = '''A coffee shop entrance features a chalkboard sign reading "Qwen Coffee 😊 $2 per cup," with a neon light beside it displaying "通义千问". Next to it hangs a poster showing a beautiful Chinese woman, and beneath the poster is written "π≈3.1415926-53589793-23846264-33832795-02384197". Ultra HD, 4K, cinematic composition'''