Update 1-js/05-data-types/12-json/article.md

Co-authored-by: Simone Pasini <66781510+pasor1@users.noreply.github.com>

Author: Dorin-David

1-js/05-data-types/12-json/article.md

@@ -165,7 +165,7 @@ meetup.place = room;       // meetup referenzia room
 room.occupiedBy = meetup; // room referenzia meetup
 
 *!*
-JSON.stringify(meetup); // Errore: conversione di struttura circolare a JSON
+JSON.stringify(meetup); // Errore: conversione di struttura circolare in JSON
 */!*
 ```