Update README.md

README.md

@@ -86,6 +86,7 @@ kwargs = dict(
     ratio="1:1",
     image_area=model.config.image_area,
     return_tensors="pt",
+    padding="longest",
 )
 pos_inputs = processor(text=prompt, **kwargs)
 neg_inputs = processor(text=NEGATIVE_PROMPT, **kwargs)