Bari Weiss is looking to calm nerves at CBS News amid rumors of big changes involving Gayle King and Norah O’Donnell — and growing fears of looming layoffs, The Post has learned. The 41-year-old journalist, who started as editor in chief on Monday, sent a note to staff on Friday seeking “to understand how you spend your working hours — and ideally, what you’ve made (or are making) that you are most proud of,” according to Variety . The memo drew comparisons to Elon Musk’s “Department of