应用: 快手
任务: 运行快手，跳转至‘关注’频道，查看赵六的视频，取消关注
操作步骤:
step_id: 0
action: CLICK
step_id: 1
action: CLICK
step_id: 2
action: CLICK
step_id: 3
action: TYPE
type_text: 赵六
step_id: 4
action: CLICK
step_id: 5
action: CLICK