fix name mismatch in text and code

README.md

@@ -243,8 +243,8 @@ for the list of all BCP-47 in the Flores 200 dataset.
 ```python
 >>> from transformers import AutoModelForSeq2SeqLM, AutoTokenizer
 
->>> tokenizer = AutoTokenizer.from_pretrained("facebook/nllb-moe-54b")
->>> model = AutoModelForSeq2SeqLM.from_pretrained("facebook/nllb-moe-54b")
+>>> tokenizer = AutoTokenizer.from_pretrained("facebook/nllb-200-distilled-600M")
+>>> model = AutoModelForSeq2SeqLM.from_pretrained("facebook/nllb-200-distilled-600M")
 
 >>> batched_input = [
 'We now have 4-month-old mice that are non-diabetic that used to be diabetic," he added.',