Update index.md, added feature set (#27100)
Update index.md, added feature set (#27100)


BhaveshSGupta/FreeCodeCamp,BhaveshSGupta/FreeCodeCamp,FreeCodeCamp/FreeCodeCamp,jonathanihm/freeCodeCamp,BhaveshSGupta/FreeCodeCamp,jonathanihm/freeCodeCamp,raisedadead/FreeCodeCamp,FreeCodeCamp/FreeCodeCamp,raisedadead/FreeCodeCamp