By Colette Bennett Taco Bell’s menu is always getting an upgrade and fans are going to like its latest offering. If there’s one thing Yum Brands (YUM) – Get Free Report darling Taco Bell isn’t familiar with, it’s becoming stagnant. After 60 years in business, the Tex-Mex chain has managed to reinvent itself time and time again, staying in favor of the younger generations for one decade after the next. From its snarky Twitter voice to naming gay icon Lil Nas X its “chief impact officer,” the brand really knows what it’s doing. It speaks volumes that even after the Mexican Pizza debacle Taco Bel…