Update README.md

LightAD-main/README.md

+代码github地址：https://github.com/BoxiYu/LightAD
 # LightAD
 A toolkit for Light Log Anomaly Detection and automated LogAD model selection. To learn more about it, please refer to our conference paper "Deep Learning or Classical Machine Learning? An Empirical
 Study on Log-Based Anomaly Detection" by [ICSE'24]