Adding a "last updated" element to any page or episode in a lesson

[GuillermoFidalgo]

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Is there any way to add anywhere on a lesson the last time it was updated?

For example in this lesson https://hsf-training.github.io/hsf-training-matplotlib/.
I would like to know when each chapter has been updated. This time should be the time when changes were pushed to Github.
Is this possible?