add Zoom Workplace Enterprise calling plan

[krrrr38]

We can use Zoom Workplace Enterprise calling plan, which is not shown on doc.

> curl -s -H'Content-Type: application/json' -H "Authorization: Bearer $token" 'https://api.zoom.us/v2/phone/calling_plans' | jq .
{
  "calling_plans": [
    {
      "type": 1001,
      "name": "Global Select Metered Calling Plan",
      "subscribed": 1,
      "assigned": 0,
      "available": 1
    },
    {
      "type": 83000,
      "name": "Zoom Workplace Enterprise",
      "subscribed": 999,
      "assigned": 99,
      "available": 900
    }
  ]
}

[kenchan0130]

pls generate docs🙃