Update README.md

[xC0dex]

No description provided.

[Copilot]

Pull Request Overview

This PR updates the README.md file by adding a new "Important" section with a brief note. The change appears to supplement the existing important notice about the project's maintenance status.

• Adds a new "Important" section to the README documentation

[Copilot]

The content 'This is also important.' is vague and uninformative. Consider providing specific, actionable information that helps users understand what they need to know.

Suggested change

	This is also important.
	The `APIWeaver.OpenApi` library is a powerful tool for developers working with OpenAPI documents in .NET.

[Copilot]

Adding a generic 'Important' section immediately after an existing IMPORTANT callout creates redundancy and confusion. Consider consolidating the information into the existing important notice or using a more specific heading.

Suggested change

	> This project is currently **not actively maintained or developed**. For a maintained alternative with a similar feature set, consider [martincostello/openapi-extensions](https://github.com/martincostello/openapi-extensions).
	## Important
	This is also important.
	`APIWeaver.OpenApi` is a lightweight .NET 9 library that extends the OpenAPI document generated by .NET's built-in OpenAPI document generator. It’s compatible with native AOT and offers extension methods and transformers for flexible customization.
	> This project is currently **not actively maintained or developed**. For a maintained alternative with a similar feature set, consider [martincostello/openapi-extensions](https://github.com/martincostello/openapi-extensions). Additionally, `APIWeaver.OpenApi` is a lightweight .NET 9 library that extends the OpenAPI document generated by .NET's built-in OpenAPI document generator. It’s compatible with native AOT and offers extension methods and transformers for flexible customization.