Get OpenAPI document for mock API

curl --request GET \
  --url https://wmc.wiremockapi.cloud/v1/mock-apis/{mockApiId}/open-api \
  --header 'Authorization: Basic <encoded-value>'

{
  "openApi": {
    "doc": "openapi: 3.1.0\ninfo:\n  title: Customer\nContacts\nManagement\nAPI\n\\nn\ndescription: API\nfor\nmanaging\ncustomer\ncontacts\nincluding\npersonal\nand\nprofessional\n\\nn\ndetails\n\\nn\nversion: 1.0.0\n\\nnservers:\n\\nn-\nurl: https\n://dev-openapi-testing.wiremockapi.cloud"
  }
}