Remove leaderboard from about us page

[supriya46788]

Remove leaderboard from about us page, its not matching with the whole theme

Instead add contributors section like this (with 5 column grid mandatory)

[github-actions]

Thank you for raising this issue!

We'll review it as soon as possible. Kindly Star the repo ⭐ We truly appreciate your contributions! ✨

Meanwhile make sure you've visited the README.md, CONTRIBUTING.md, and CODE_OF_CONDUCT.md before creating a PR for this. Also, please do NOT create a PR until this issue has been assigned to you. 😊

[rudrasingh993]

hi i would like to work on this issue can u please assign it to me

[supriya46788]

@rudrasingh993 assigned to you...you can open pr now

[rudrasingh993]

@supriya46788 i save sucesfully generated pr pls review and let me know the same

[rudrasingh993]

@supriya46788 i have updated it and maked it responsive psl review it and let me know if is any changes required Thanks