response_format_options missing from ChangeInput struct

https://gerrit-review.googlesource.com/Documentation/rest-api-changes.html#change-input

The response_format_options allows for populating some fields in the response that are excluded by-default, without one needs to query again using a method that supports those options if one wants any of those fields.

That field is not present in your struct representing that request body https://github.com/andygrunwald/go-gerrit/blob/31687dc5673cabc520980d8b1de2fe4d8f7cf666/changes.go#L408