update app.py

app.py

@@ -79,6 +79,7 @@ from io import BytesIO
 from diffusers import StableDiffusionInpaintPipeline
 from huggingface_hub import hf_hub_download
 
+from huggingface_hub import snapshot_download
 from kolors.pipelines.pipeline_stable_diffusion_xl_chatglm_256_inpainting import StableDiffusionXLInpaintPipeline
 from kolors.models.modeling_chatglm import ChatGLMModel
 from kolors.models.tokenization_chatglm import ChatGLMTokenizer