next.js

d420233e - Hotfix for missing application/json header in Prepr example (#55517)

Hotfix for missing application/json header in Prepr example (#55517) I added the application/json header to the API lib of the Prepr example. Because without it when statically generating an error is produced by GraphQL. Co-authored-by: kodiakhq[bot] <49736102+kodiakhq[bot]@users.noreply.github.com>