chore: improve comment (typo)

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

Author: manuelodelain

app/composables/use-roadiz-schema-org-event.ts

@@ -22,7 +22,7 @@ function mapEventAvailabilityToStatusSchema(availabilityCode: EventsApi.Availabi
         case AvailabilityCode.CANCELLED:
             return 'EventCancelled'
 
-        // An Event date POSTPONED haven't a new date proposed yet, so we use EventPostponed
+        // A POSTPONED event date doesn't have a new date proposed yet, so we use EventPostponed
         case AvailabilityCode.POSTPONED:
             return 'EventPostponed'