add note that asks to use React version < 19 for type checking

[Punith1117]

Because

defaultProps and PropTypes are deprecated from React version 19.

This PR

• The note asks the readers to use React version lesser than 19 to make the type checking with PropTypes and defaultProps compatible.
• The note also states the changes to be made in package.json file to install React version < 19.

Issue

Closes #29510

Pull Request Requirements

• [x] I have thoroughly read and understand The Odin Project curriculum contributing guide
• [x] 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
• [x] The Because section summarizes the reason for this PR
• [x] The This PR section has a bullet point list describing the changes in this PR
• [x] If this PR addresses an open issue, it is linked in the Issue section
• [x] If any lesson files are included in this PR, they have been previewed with the Markdown preview tool to ensure it is formatted correctly
• [x] If any lesson files are included in this PR, they follow the Layout Style Guide

[Punith1117]

@MaoShizhong Thank you for suggesting the changes to be made. That makes it more clear and simpler. I will commit and push the changes soon.