Update API Definition for /circulation/requests to include all required fields

Overview:

The API definition at: https://s3.amazonaws.com/foliodocs/api/mod-circulation/circulation.html#circulation_requests_post

Does not list "pickupServicePointId" as a required field.

  "required": [
    "itemId",
    "requesterId",
    "requestType",
    "requestDate",
    "fulfilmentPreference"
  ]

Steps to Reproduce:

1. Attempt to post the following payload to FOLIO snapshot (via Postman):

   {
       "requestDate": "{{$isoTimestamp}}"
       "requestType": "Page",
       "fulfilmentPreference": "Hold Shelf",
       "requesterId": "bec20636-fb68-41fd-84ea-2cf910673599",
       "itemId": "23fdb0bc-ab58-442a-b326-577a96204487",
   }
   

Expected Results:
Based on the endpoint documentation, this should post successfully, as pickupServicePointId is not a required field.

Actual Results:
Receive the following error:

{
    "errors": [
        {
            "message": "Hold Shelf Fulfillment Requests require a Pickup Service Point",
            "parameters": [
                {
                    "key": "id",
                    "value": null
                }
            ]
        }
    ]
}

Additional Information:
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