*셀 구성할 때 마지막 셀 / 마지막 전 셀이 생성이될 때 로직실행

func collectionView(_ collectionView: UICollectionView, **cellForItemAt** indexPath: IndexPath) -> UICollectionViewCell {
	guard let cell = collectionView.dequeueReusableCell(withReuseIdentifier: MoreMoveCell.self, 
																											for: indexPath) as? MoreMovieCell else { return UICollectionViewCell() }

	cell.configure(data[indexPath.row])
		
	// ✅ infinite scrolling
	if indexPath.row == data.count -1 { // 마지막 셀이 생성(구성)될 때 
		**loadMoreMovie**() {
			DispatchQueue.main.async {
				collectionView.reloadData()
			}
		}
	} 
	return cell
}