Clean up and validate Skull dataset data

[leandrumartin]

🎯 Goal / Objective

A clear and concise description of what this task aims to achieve. Why is this task important?

There are some lingering errors in the Skull dataset, such as errors in text labels, descriptions, etc.

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✅ Tasks to be Completed

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• Run the web app alongside the Skull slideshow and follow along. Fix any discrepancies between the data displayed in the app and what is in the slideshow.

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Acceptance Criteria

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• The new feature is implemented as described.
• All related code passes the repository's workflow checks (linting, tests).
• The application runs without errors after the changes are made.
• (If applicable) New automated tests have been added to cover the changes.
• Any related documentation has been updated, including JSDoc comments or docstrings

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Additional Context

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Important

Though not a strict prerequisite, it may be easier to complete this task if #374 is completed first.