应用: 哔哩哔哩
任务: 打开哔哩哔哩，进入纪录片频道，订阅“哔哩哔哩纪录片”
操作步骤:
step_id: 0
action: CLICK
step_id: 1
action: CLICK
step_id: 2
action: CLICK
step_id: 3
action: CLICK