Changes to Get a meeting

added the media type application/json for the response with the status 403

added the non-success response with the status 429

removed the invalid_json enum value from the error response property for the response status 400

response property detail list-of-types was narrowed by removing types array from media type application/json of response 400

added the required property businesses to the response with the 200 status

added the required property contacts to the response with the 200 status