Update app.py

app.py

@@ -5,7 +5,7 @@ os.system('pip install --upgrade --pre --extra-index-url https://download.pytorc
 # Actual demo code
 import spaces
 import torch
-from diffusers import WanPipeline, AutoencoderKLWan
+from diffusers import WanPipeline, AutoencoderKLWan, UniPCMultistepScheduler
 from diffusers.models.transformers.transformer_wan import WanTransformer3DModel
 from diffusers.utils.export_utils import export_to_video
 import gradio as gr