[docs]: Improve contributing.md guide #1540

[Parul1606]

Closes

Closes #1540

Description

I have Improved the contributing.md guide in the easiest way.

Screenshots

Checklist:

• [x] I have linked the PR to the correct issue.
• [x] I have read the Contribution Guidelines

[Parul1606]

So sorry I misunderstood the issue labels and made the PR