Updates to the Jupyter notebook are not reflected in nbviewer

[bkowshik]

Describe the bug

Reading the notebook on nbviewer shows an older version of the notebook, missing the recent changes.

To Reproduce

Visit the link to the notebook on Github to see the retain set is much larger text.
https://github.com/unlearning-challenge/starting-kit/blob/main/unlearning-CIFAR10.ipynb

Visit the link to the notebook on nbviewer to see the retain set is much later text.
https://nbviewer.org/github/unlearning-challenge/starting-kit/blob/main/unlearning-CIFAR10.ipynb

Expected behavior

The expected behaviour is to see the retain set is much larger on nbviewer as well.

Screenshots

Desktop

• OS: Mac
• Browser: Google Chrome
• Version: Version 114.0.5735.198 (Official Build) (x86_64)