chore: update README.md

rpiraces-plain · Nov 13, 2023 · 396eeef · 396eeef
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@@ -494,6 +494,7 @@ Therefore, if we want to "randomize" those requests, so an attacker can not simp
 Check the folder `./csrf` to play around with the demo and discover how to implement these tokens.
 
 ## Hashes
+[![Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/jakevdp/PythonDataScienceHandbook/blob/master/notebooks/Index.ipynb)
 
 **Video:** [explanation demo](https://youtu.be/gZcEUoHG8fk).