Stellantis NV is laying off more workers at its Jeep plant in Illinois “in order to operate the plant in a more sustainable manner,” the automaker said on Monday in a statement. The company didn’t disclose how many of Belvidere Assembly Plant’s nearly 2,000 employees producing the Cherokee crossover would be affected. Stellantis is offering retirement packages to United Auto Workers-represented employees at the plant starting May 31 and is laying off both hourly and salaried staff there as early as May 27. Belvidere has been one of Stellantis’ worst-hit plants by the global semiconductor short…