fix grammar of model card again

README.md

@@ -11,4 +11,4 @@ thumbnail: https://en.wikipedia.org/wiki/Bart_Simpson#/media/File:Bart_Simpson_2
 from transformers import AutoTokenizer
 tokenizer = AutoTokenizer.from_pretrained("a1noack/bart-large-gigaword")
 ```
- - This model achieves ROUGE-1 / ROUGE-2 / ROUGE-L of 37.28 / 18.58 / 34.53 on the Gigaword test set; this is pretty good when compared to PEGASUS, `google/pegasus-gigaword`, 39.12 / 19.86 / 36.24.
+ - This model achieves ROUGE-1 / ROUGE-2 / ROUGE-L of 37.28 / 18.58 / 34.53 on the Gigaword test set; this is pretty good when compared to PEGASUS, `google/pegasus-gigaword`, which achieves 39.12 / 19.86 / 36.24.