added upload for txt files

app.py

@@ -60,8 +60,8 @@ This model uses a pretrained snapshot trained on the [Atticus](https://www.attic
 Model used for this demo: https://huggingface.co/marshmellow77/roberta-base-cuad
 
 Related blog posts:
-- https://towardsdatascience.com/how-to-set-up-a-machine-learning-model-for-legal-contract-review-fe3b48b05a0e
-- https://towardsdatascience.com/how-to-set-up-a-machine-learning-model-for-legal-contract-review-part-2-6ecbbe680ba
+- https://bit.ly/3pKWICB
+- https://bit.ly/3ETApRO
 """
 )