The Culinary Workers Union Local 226 says it has reached a tentative agreement with MGM Las Vegas. The news was announced by the union – which covers half of the 50,000 employees threatening to strike in Las Vegas – in a tweet late Saturday. This comes after Friday’s announcement labour union and the other big casino employer threatened by the job action, Caesars Entertainment, was reached Friday afternoon. “BREAKING. We are pleased to announce that a tentative agreement has been reached with @MGMResortsIntl ,” read the late-night announcement on Twitter. “The historic new 5-year contract covers approximately 24,000 workers at…