Updated CONTRIBUTING.md

[samarpitadas]

Description

CONTRIBUTING.md contains instructions for both contributions through through PCs run locally and the GitHub desktop.

Resolves: [198]

Checklist

Before submitting this pull request, kindly verify that the ensuing checkpoints have been reached.

• [✓ ] Have you adhered to the repository's defined coding convention rules?
• [ ✓] Have you updated the 'documentation.md' file with the method/function documentation?
• [✓ ] Have you sent a message along with the result or response?
• [✓ ] Have you used the try-catch technique?
• [ ✓] Has the method/class been added to the documentation (md file)?

Screenshots

I certify that I have carried out the relevant checks and provided the requisite screenshot for validation by submitting this pull request. I appreciate your contribution.

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[hereisSwapnil]

198