Changes to Set a stack's cover

response property detail list-of-types was widened by adding types string to media type application/json of response 422

the response property detail became required for the status 422

added the media type application/json for the response with the status 404

added the non-success response with the status 401

added the non-success response with the status 403

added the non-success response with the status 429

endpoint added