Update CONTRIBUTING.md

[PradnyaGaitonde]

Issue Title:

resolve issue: #issue_number
closes #71

Type of change ☑️

What sort of change have you made: Successfully added instructions to contribute using GitHub Desktop.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Code style update (formatting, local variables)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ x] This change requires a documentation update

Checklist: ☑️

• [ x] My code follows the guidelines of this project.
• [ x] I have performed a self-review of my own code.
• [ x] I have commented my code, particularly wherever it was hard to understand.
• [ x] I have made corresponding changes to the documentation.
• [ x] My changes generate no new warnings.
• [ x] I have added things that prove my fix is effective or that my feature works.
• [x ] Any dependent changes have been merged and published in downstream modules.

Screenshot of the changes made in your work (if applicable):

How Has This Been Tested? ⚙️

Describe how have you verified the changes made.

[github-actions]

Thank you for submitting this pull request.
We will review the changes and get in contact with you as soon as possible.

[ashutoshgithubs]

@PradnyaGaitonde I reviewed your PR. It's good to merge. Thanks for your contribution. Keep supporting this project with your code. Happy coding :)