React : Fixed overview

[devnchill]

Because

Some overview points didn't abide the rules , this fixed them .

This PR

Issue

Closes #29039

Additional Information

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
• [ ] 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