DOC: Fix Documentation Requirements.

[phmbressan]

Pull request type

• [X] ReadMe, Docs and GitHub updates

Checklist

• [X] CHANGELOG.md has been updated (if relevant)

Current behavior

The documentation requirements had windows only related dependencies.

New behavior

The docs requirements were generated on a linux machine to mirror ReadTheDocs build process.

Breaking change

• [ ] Yes
• [X] No

Additional information

The docs requirements seem to be fixed, but I could not build them locally due to these lines keep going forever:

executing compare_flights user/compare_flights
curl error details: 

I don't know if this is a transitory server issue or something on our side @Gui-FernandesBR .

[Gui-FernandesBR]

Working fine on both read the docs and local machine.

cd docs
make clean