Update PyFluent author and maintainer metadata

[jorgepiloto]

🐞 Problem

Author and maintainer fields in setup.py file should be compliant with PyAnsys metadata. At the moment, this is how these fields look like:

https://github.com/pyansys/pyfluent/blob/fb978549c5b96ea822c8f3bec0e5246506e4b67d/setup.py#L48-L50

💡 Solution

Update these fields with the values exposed in the developers guide, see The setup.py file explanation.