Update README.md

[AIOps Challenge](https://competition.aiops-challenge.com/home/competition/1484441527290765368)

## LICENSE

AIOps Challenge 2020 Dataset © 2020 by Dan Pei is licensed under Creative Commons Attribution-NonCommercial 4.0 International. To view a copy of this license, visit https://creativecommons.org/licenses/by-nc/4.0/

Unless otherwise agreed by the organizers and the contestant, the contestant shall ensure that it only uses the basic data for non-commercial purposes such as scientific research or classroom teaching, and take full responsibility for the use of conversion basic data, also ensure the organizer and its affiliated party are free from expenses or litigation caused by the any use of basic data.

## Descripion of the Dataset