Fix python code block in model card

README.md

@@ -36,4 +36,5 @@ from transformers import pipeline
 pipe = pipeline("text-classification", model="stefanbschneider/bert-base-uncased-dummy")
 sentence1 = 'Amrozi accused his brother , whom he called " the witness " , of deliberately distorting his evidence .'
 sentence2 = 'Referring to him as only " the witness " , Amrozi accused his brother of deliberately distorting his evidence .'
-pipe([sentence1, sentence2])
+pipe([sentence1, sentence2])
+```