Refine wording, enhance grammar, and correct typos in README.md

[ismailbentabett]

Summary

This pull request is dedicated to refining the wording, improving grammar, and fixing typos in the main README.md of the React repository. The purpose is to enhance the clarity and readability of the documentation without introducing any breaking changes. These adjustments aim to provide a more polished user experience for contributors and users exploring the React repository.

How did you test this change?

The changes made in this pull request were locally reviewed to ensure alignment with the existing content and adherence to the documentation style. Given that the modifications involve only improvements to language and formatting in the README, testing focused on visual inspection in a markdown viewer to confirm proper rendering.

This pull request aligns with the outlined guidelines for contributing to the React repository, emphasizing the non-disruptive nature of the documentation enhancements. The goal is to maintain stability and improve the overall quality of information for individuals interacting with the React project.

[react-sizebot]

Comparing: 60a927d04ad3888facebcdf7da620aa1cfc9528f...a85d8e6bd7f787a7ccab55192c892400536e7198

Critical size changes

Includes critical production bundles, as well as any change greater than 2%:

Name	+/-	Base	Current	+/- gzip	Base gzip	Current gzip
oss-stable/react-dom/cjs/react-dom.production.min.js	=	176.19 kB	176.19 kB	=	54.88 kB	54.88 kB
oss-experimental/react-dom/cjs/react-dom.production.min.js	=	178.29 kB	178.29 kB	=	55.53 kB	55.53 kB
facebook-www/ReactDOM-prod.classic.js	=	571.89 kB	571.89 kB	=	100.56 kB	100.56 kB
facebook-www/ReactDOM-prod.modern.js	=	555.65 kB	555.65 kB	=	97.63 kB	97.63 kB
test_utils/ReactAllWarnings.js	Deleted	67.55 kB	0.00 kB	Deleted	16.54 kB	0.00 kB

Significant size changes

Includes any change greater than 0.2%:

Expand to show

Name	+/-	Base	Current	+/- gzip	Base gzip	Current gzip
test_utils/ReactAllWarnings.js	Deleted	67.55 kB	0.00 kB	Deleted	16.54 kB	0.00 kB

Generated by :no_entry_sign: dangerJS against a85d8e6bd7f787a7ccab55192c892400536e7198

[rickhanlonii]

Thanks for submitting, but we don't accept nits to the readme because people just change them back and forth.