message: Fix message on verify script
diff: @@ -33,7 +33,7 @@ for (let id of ids) {
  const { next, previous } = metadata[id];
  if (next && !ids.includes(next)) {
  - errors.push(`Next ${next} does not exists in ${id}.`);
  + errors.push(`Next ${next} does not exist in ${id}.`);
  }
  if (previous && !ids.includes(previous)) {
  