Update README.md

README.md

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+---
+license: mit
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 # <a name="introduction"></a> BARTpho: Pre-trained Sequence-to-Sequence Models for Vietnamese
 
 
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 **Please CITE** our paper when BARTpho is used to help produce published results or incorporated into other software.
 
-For further information or requests, please go to [BARTpho's homepage](https://github.com/VinAIResearch/BARTpho)!
+For further information or requests, please go to [BARTpho's homepage](https://github.com/VinAIResearch/BARTpho)!