[feat]: adding carousel in the testimonial section in about.html page

[Iamdivyak]

currently, the testimonial section is not that appealing.

carousel would be a better alternative from the user experience point of view.
kindly assign this task to me under hacktoberfest.

[SyedImtiyaz-1]

any updates @Iamdivyak ?

[Iamdivyak]

yea! I'm working, I will make a pull request tomorrow.