[Typo]: Replace words on the page titled "Your First Component“

Summary

Replacing words on the "Your First Component." page makes the technical document more rigorous

Page

https://react.dev/learn/your-first-component

Details

Reason for Change:
Replacing “lets” with “allows” provides a more formal tone, especially fitting for technical documentation.
Adding a comma in "rich, structured documents" enhances clarity by separating descriptive adjectives.

Screenshot of typo:

打开 https://react.dev/learn/your-first-component 上的 React 文档页面，找到 issue 和截图中指出的措辞。将“lets”替换为“allows”，并在“rich, structured documents”中添加逗号；确认渲染后的页面显示所要求的措辞。