Update CONTRIBUTING.md (#5762)

* Updating `CONTRIBUTING.md`

* Clean up

* Clarification

* Add more

* Update .github/CONTRIBUTING.md

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* Update .github/CONTRIBUTING.md

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Update .github/CONTRIBUTING.md

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* Update .github/CONTRIBUTING.md

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* Apply suggestions from code review

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* Typo

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Author: compulim