New Jersey Gov. Phil Murphy often touts his administration’s record on improving the state’s financial health, and Wall Street has given him plenty to talk about in recent weeks. S&P Global Ratings on Friday upgraded New Jersey’s credit rating one notch to A-, lifting the rating back to where it was in 2017, the year before Murphy took office. That follows an upgrade from Moody’s Investor Service in early March, which the agency announced a few days before Murphy unveiled his $48.9 billion budget proposal for the new fiscal year that begins July 1. Both agencies partly attributed the rating up…