update preprint link

app.py

@@ -263,9 +263,9 @@ description = """
 The ROOTS corpus was developed during the [BigScience workshop](https://bigscience.huggingface.co/) for the purpose
 of training the Multilingual Large Language Model [BLOOM](https://huggingface.co/bigscience/bloom). This tool allows
 you to search through the ROOTS corpus. We serve a BM25 index for each language or group of languages included in
-ROOTS. You can read more about the details of the tool design
-[here](https://huggingface.co/spaces/bigscience-data/scisearch/blob/main/roots_search_tool_specs.pdf). For more
-information and instructions on how to access the full corpus check [this form](https://forms.gle/qyYswbEL5kA23Wu99)."""
+ROOTS. We also offer exact search which is enabled if you enclose your query in double quotes. For details, please check out
+the preprint describing our tool available [on Arxiv](https://arxiv.org/abs/2302.14035). For more
+information and instructions on how to access the full corpus consult [this form](https://forms.gle/qyYswbEL5kA23Wu99)."""
 
 
 if __name__ == "__main__":