Anchor tags now support the download attribute to handle this: https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Elements/a#download

This would require removing it from the documentation too:
https://github.com/cantaloupe-project/cantaloupe-project.github.io/blob/faab838c991262d8994e209b998dbae20528978a/manual/4.1/endpoints.html#L137

This is stored in the constant RESPONSE_CONTENT_DISPOSITION_QUERY_ARG