Review README and DESCRIPTION content

[mianzg]

@coulbyph Hi, please kindly review the content of README: https://github.com/openwashdata/saniabidjan?tab=readme-ov-file#saniabidjan

Also, the documentation of the package is the following.
Title: Data About Behavior and Practices of Managing Sanitation Facilties in Abidjan, Cote d’Ivoire
Description: This data package contains household survey data collected from two low-income areas of Abidjan, Cote d'Ivoire. The survey was focusing on practices related to the management of sanitation facilities, specifically, latrines and tanks.

Let me know if you would like to make some changes