Update README.md

this example python throws error without the from_tf arg

README.md

@@ -40,7 +40,7 @@ import requests
 
 from transformers import CLIPProcessor, CLIPModel
 
-model = CLIPModel.from_pretrained("openai/clip-vit-base-patch32")
+model = CLIPModel.from_pretrained("openai/clip-vit-base-patch32", from_tf=True)
 processor = CLIPProcessor.from_pretrained("openai/clip-vit-base-patch32")
 
 url = "http://images.cocodataset.org/val2017/000000039769.jpg"