Issue-3558-tensorflow

[charlottejmc]

I have added a note in the lesson and the notebook to recommend that Colab users install a specific version of tensorflow using !pip install tensorflow==2.15.0, expressing that this may not be a permanent solution.

I won't close the issue immediately, as I would like to first check that the notebook renders correctly (we cannot see it before merging).

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[anisa-hawes]

I am closing this PR, following correspondence with the author who confirms that the inclusion of !pip install tensorflow==2.15.0 (to force the program to use an older version of tensorflow) is not required.