justTypes setting description needs rewording

[f3]

Quicktype: Just Types
☑️ Produce just types, or (de-)serialization code as well?

Well hmm, which is it when checked? [left] or [right]? 😃

Suggestion:

https://github.com/quicktype/quicktype-vscode/blob/master/package.json#L54

  "quicktype.justTypes": {
      "type": "boolean",
      "default": true,
      "description": "Produce only types; no (de-)serialization code"