docs: correct typo in useStyles$() docs

[estherbrunner]

What is it?

• Feature / enhancement
• Bug
• Docs / tests

Description

On the component overview documentation page the functions to use styles are wrongly named in singular form. In code and the rest of the documentation the plural form is used, see: /src/core/use/use-styles.ts.

Use cases and why

• 1. As someone wanting to learn how to use Qwik I might get discouraged by docs not consistent with the actual code.

Checklist:

• My code follows the developer guidelines of this project
• I have performed a self-review of my own code
• I have made corresponding changes to the documentation
• Added new tests to cover the fix / functionality

[shairez]

thanks @estherbrunner !