text: Title: CI: script that runs all Colab notebooks
  Body: This script can be Github Action that is only executed when a new release is tagged.
  We want to test that all Colab notebooks run without execution errors (particularly because they may not have installed the right version of dependencies, eg. if a dependency got updated without us knowing).
  
  Cf: https://stackoverflow.com/questions/61762045/running-google-colab-every-day-at-a-specific-time