Input type has missing fields

https://github.com/regadas/github-actions-dhall/blob/afa7bc5f08b5804230f0d7b5137b2060ae1b7964/types/Input.dhall does not include all fields that are mentioned in [the GHA docs](https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#onworkflow_dispatchinputs)