Small fix on the description including repo with the referenced notebook

README.md

@@ -31,7 +31,7 @@ Forecasting future world events is a challenging but valuable task. Forecasts of
 
 ## Autocast Dataset
 
-The original [Autocast dataset can be downloaded here](https://people.eecs.berkeley.edu/~hendrycks/autocast.tar.gz). For more details on how to use the Autocast dataset and news articles, please refer to our short demonstration in `usage.ipynb`.
+The original [Autocast dataset can be downloaded here](https://people.eecs.berkeley.edu/~hendrycks/autocast.tar.gz). For more details on how to use the Autocast dataset and news articles, please refer to the short demonstration in `usage.ipynb` at the [repository](https://github.com/andyzoujm/autocast) of the authors.
 
 Each question has the following fields:
   ```json