Update monitor.md

[yunzhongyue23]

代码中monitor默认的统计周期是60s,monitor -h看到的默认统计周期也是60秒，这里是否应该改成60秒

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[hengyunabc]

还有英文版本的麻烦同步更新下。

[yunzhongyue23]

还有英文版本的麻烦同步更新下。

好的