[FEATURE REQUEST] Update documentation after v2 paper is published

[kingsleynweye]

Is your feature request related to a problem? Please describe.
By the time the CityLearn v2 paper is published, the text in the CityLearn website will be dated.

Describe the solution you'd like
Use v2 paper to update content at citylearn.net

Describe alternatives you've considered
NIL

Additional context
NIL