Fix corrupted thumbnail in Malhotra et al. notebook

[acocac]

Summary

The PR fixes corrupted thumbnail in the gallery section.

List of changes proposed in this PR (pull-request)

• Replace url to https://github.com/eds-book-gallery/3286b92f-4fae-4cc6-a29e-e408bc844542/assets/13321552/dca087c1-27ad-40df-b9ae-32749fd55ae8?raw=True

What should a reviewer concentrate their feedback on?

• [ ] Everything looks ok?

Acknowledging contributors

• [x] All contributors to this pull request are already named in the table of contributors in the README file.
• [ ] The following people should be added to the table of contributors in the README file:

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