Update instructions for using GitHub Desktop in the tutorial

[varsha-1110]

🐞 Problem
The current tutorial primarily focuses on Git CLI for contributions. Many beginners use GitHub Desktop, and there is no clear guide or mention of how to use it with this project.

🎯 Goal
Make it easier for users who are more comfortable with graphical interfaces to contribute by providing GitHub Desktop instructions alongside the CLI-based ones.

💡 Possible solutions
Add a dedicated section or sidebar note in the tutorial for GitHub Desktop users that shows how to fork, clone, make changes, and create pull requests.

📋 Steps to solve the problem

Comment below about what you've started working on.

Add, commit, push your changes.

Submit a pull request and add this in comments - Addresses #

Ask for reviews in comments section of pull request.

Celebrate your contribution to this project. 🎉

[baforrester]

I would like to add the above functionality