She’s not judging these celebs by their book covers. Rita Wilson is back on Broadway in “Celebrity Autobiography,” where a rotating cast of famous faces playfully reads excerpts from the memoirs of A-listers — and finds the funny in their words. Wilson has met all the women whose tell-alls she’s spoofing — Elizabeth Taylor, Pamela Anderson and Celine Dion — and said she understands why they felt compelled to spill the tea in the pages of their life stories. “In all of these people’s cases,