Jenna Bush Hager is as pumped as anybody for Taylor Swift 's wedding ... but she's pumping the brakes on Ryan Seacrest as a possible officiant. We caught up with the "Today with Jenna & Friends" cohost outside of 30 Rockefeller Plaza in New York City Thursday, where she told us she thinks Tay Tay's future nuptials with NFL tight end Travis Kelce will be chock-full of celebs ... but definitely doesn't think Ryan will make a cameo officiating the ceremony. As you know, TS and TK announced their