How do I change `string` to `textarea` (or similar) in Fastfile

Question

In the below section there is a string field. I can’t find any documentation for it in fastlane and I have no idea what it can be changed to. I would like it to be a textarea or something similar, but I don’t want to break my build trying to find a suitable change.

parameters {
    gitParameter(
      ...
    )
    choice(...)
    choice(...)
    string(defaultValue: '', description: 'Changelog', name: 'CHANGELOG’)
}