NEW YORK — Jenna Bush Hager better get her wine glass ready.NBC appointed her Tuesday as co-host of the "Today" show's fourth hour with Hoda Kotb, and she'll replace Kathie Lee Gifford in that role in April.Kotb and Gifford were successful pioneers in expanding "Today," with an irreverent hour where glasses of wine were often kept close by.The daughter of former President George W.