Fix a typo.

README.md

@@ -8,7 +8,7 @@ thumbnail: Chinese Lyrics Generation with Masked Sequence-to-Sequence Pretrainin
 
 # Chinese Generation with Masked Sequence-to-Sequence Pretraining
 
-This repository demostrate a format-controllable Chinese lyric generator, fine-tuned on [Chinese-Lyric-Corpus](https://github.com/gaussic/Chinese-Lyric-Corpus) using a [MASS](https://arxiv.org/abs/1905.02450)-like strategy.
+This repository demostrates a format-controllable Chinese lyric generator, fine-tuned on [Chinese-Lyric-Corpus](https://github.com/gaussic/Chinese-Lyric-Corpus) using a [MASS](https://arxiv.org/abs/1905.02450)-like strategy.
 
 # Usage