[docs] [issue9101] reference json format in file formats chapter

Ezio Melotti <ezio.melotti@gmail.com> added the comment: We don't have a "Data-interchange Formats" section, so the "Internet Data Handling" section seems more appropriate than the "File Formats" one, right? ---------- _______________________________________ Python tracker <report@bugs.python.org> <http://bugs.python.org/issue9101> _______________________________________