Feat: Keys in React: Replace mentions of uuid with crypto.randomUUID

[Asartea]

Because

• React Keys: Replace uuid() with crypto.randomUUID() #28699

This PR

• Replaces mentions of uuid with crypto.randomUUID()
• Replaces the link to the package with a link to the MDN doc page

Issue

Closes #28699

Additional Information

Pull Request Requirements

• I have thoroughly read and understand The Odin Project curriculum contributing guide
• The title of this PR follows the location of change: brief description of change format, e.g. Intro to HTML and CSS lesson: Fix link text
• The Because section summarizes the reason for this PR
• The This PR section has a bullet point list describing the changes in this PR
• If this PR addresses an open issue, it is linked in the Issue section
• If any lesson files are included in this PR, they have been previewed with the Markdown preview tool to ensure it is formatted correctly
• If any lesson files are included in this PR, they follow the Layout Style Guide