[DOCS] Typo in npm-scripts section

[darcyclarke]

  Original bug ticket: [https://npm.community/t/10847](https://npm.community/t/10847)
  Originally filed: 2019-11-01T14:02:40.831Z

[ajaymathur]

Hey @darcyclarke , I think we can close this issue. Unless my PR did not resolved the real issue. 🙂

[darcyclarke]

Thanks @ajaymathur!