Update "our team" section to display our active contributors in it.

[deeqakkk]

~Try to make it dynamic so that it changes automatically according to the latest PR summited by a contributor.
~Make it differentiable among Project admin, Mentors, and our contributors.
~one more basic thing as follows

Change that truck icon to something related to education instead of delivery.

[ShwetKhatri2001]

I'd like to work on this issue

[Akshima-Ghai]

@ShwetKhatri2001 issue assigned