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README.md

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-This model has been trained without supervision following the approach described in [Towards Unsupervised Dense Information Retrieval with Contrastive Learning](https://arxiv.org/abs/2112.09118), the associated GitHub repository is available here https://github.com/facebookresearch/contriever.
+This model has been trained without supervision following the approach described in [Towards Unsupervised Dense Information Retrieval with Contrastive Learning](https://arxiv.org/abs/2112.09118). The associated GitHub repository is available here https://github.com/facebookresearch/contriever.
 
 ## Usage (HuggingFace Transformers)
 Using the model directly available in HuggingFace transformers requires to add a mean pooling operation to obtain a sentence embedding.