Nov 22 (Reuters) – Worldwide credit evaluations organization Moody’s overhauled Saudi Arabia’s rating to “Aa3” from “A1” on Friday, citing the country’s endeavors to differentiate past its oil economy. The world’s driving oil exporter is contributing billions of dollars to attain its Vision 2030 arrange, which centers on diminishing its dependence on oil and investing more on foundation to boost businesses like tourism, sports and fabricating.