fix: parsing bug when using json dryFormat and the body is a json array

[reubenmiller]

Fixing a small bug which resulted in the json dry format output being converted to a string instead of an array.

Example

Doing a dry run on a request where the body is a json array.

c8y api POST /some/api --template '[{"name":"foo"}]' --dry --dryFormat json | c8y util show --select body -o json

Before

{
  "body": "[{\"name\":\"foo\"}]\n"
}

After

{
  "body": [
    {
      "name": "foo"
    }
  ]
}