Update README.md

[bajo1207]

I have also checked again the documentation once again. There is no reference to the notebook that was used to select the parameters of xgboost, in the index page. The notebook is "XGBoost Fitting Using Bayesian Optimization"

Not on the index page, but in the water_security.classification. Does it need to be on the index page?

[VasLem]

I have also checked again the documentation once again. There is no reference to the notebook that was used to select the parameters of xgboost, in the index page. The notebook is "XGBoost Fitting Using Bayesian Optimization"

Not on the index page, but in the water_security.classification. Does it need to be on the index page?

Hmm, then maybe mention that the user can access the classification specifics, by mentioning the link to the classification? Because it is not very visible in the front page that there are other notebooks