fix(demo): 修复环图自定义 label 的 demo, 获取 labelItems 为空 (#2838)
fix(demo): 修复环图自定义 label 的 demo, 获取 labelItems 为空 (#2838)

Co-authored-by: xinming <ddbb1563be9e0957f076713c6a60058d36ee5b93@antfin.com>
antvis/g2,antvis/g2,antvis/g2