This PR updates the 'Contributing' section of the README to enhance clarity and make instructions straightforward for new contributors.

1. Formatted statements with bullet points as in other README files.
2. Updated the 'How to Contribute' link to a valid URL.
3. Added images of contributors.

These changes are intended to make the guide easier to follow and more engaging for new contributors.

- Changed the contribution guide link in the README.md from the markdown file to the corresponding section on the official website.
- This change ensures that the link remains stable and is not impacted by the frequent changes to Markdown files.