Update requirements.txt

huggingface_hub==0.25.2 to fix: cannot import name 'cached_download'

requirements.txt

@@ -17,6 +17,7 @@ visdom
 opencv-python==4.5.4.60  
 
 diffusers==0.8
+huggingface_hub==0.25.2  
 transformers
 scipy
 ftfy