[BUG] wrong documentation about the hypervolume

[MLopez-Ibanez]

Checklist

• I searched existing issues
• I'm using the latest pymoo version

Bug Description

https://pymoo.org/misc/indicators.html#nb-hv

The documentation says the hypervolume is calculated using the DEAP implementation but this is not longer true.

Minimal Code to Reproduce

NA

Error Message

PyMoo & Python Version

pymoo latest version