Update README.md

README.md

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 ## 📊 Kaggle Notebooks
-The Kaggle Notebooks are sourced from the [Meta Kaggle Code](https://www.kaggle.com/datasets/kaggle/meta-kaggle-code) dataset. They were cleaned using a multi-step filtering process, which included:
+The Kaggle Notebooks are sourced from the [Meta Kaggle Code](https://www.kaggle.com/datasets/kaggle/meta-kaggle-code) dataset, licensed under Apache 2.0. They were cleaned using a multi-step filtering process, which included:
 
 - Removing notebooks with syntax errors or less than 100 characters.
 - Extracting metadata for notebooks that reference Kaggle datasets. When possible, we retrieve the datasets references in the notebook and add information about them to the beginning of the notebook (description, `ds.info()` output and 4 examples)