next.js

515a98fe - fix: apply Geist fonts correctly on default cna template (#77237)

fix: apply Geist fonts correctly on default cna template (#77237) # Summary The [Geist Fonts](https://vercel.com/font) in [default-tw template](https://github.com/vercel/next.js/tree/canary/packages/create-next-app/templates/default-tw) doesn't load due to missing classname declaration. This PR fixed this issue. ## Before  --- ## After  CC: @samcx --------- Co-authored-by: JJ Kasper <jj@jjsweb.site>