code: func (s *ChangesService) PublishDraftRevision(changeID, revisionID string) (*Response, error) {
  	u := fmt.Sprintf("changes/%s/revisions/%s/publish", changeID, revisionID)
  
  	req, err := s.client.NewRequest("POST", u, nil)
  	if err != nil {
  		return nil, err
  	}
  
  	return s.client.Do(req, nil)
  }
docs: // PublishDraftRevision publishes a draft revision.
  //
  // Gerrit API docs: https://gerrit-review.googlesource.com/Documentation/rest-api-changes.html#publish-draft-revision