[README] Add the CG-MuAlign paper for entity alignment. (dmlc#2402)

Co-authored-by: Minjie Wang <[email protected]>

README.md

@@ -226,6 +226,8 @@ We are currently in Beta stage.  More features and improvements are coming.
 
 1. [**Principal Neighbourhood Aggregation for Graph Nets**](https://arxiv.org/abs/2004.05718), *Gabriele Corso, Luca Cavalleri, Dominique Beaini, Pietro Liò, Petar Veličković*
 
+1. [**Collective Multi-type Entity Alignment Between Knowledge Graphs**](https://dl.acm.org/doi/abs/10.1145/3366423.3380289), *Qi Zhu, Hao Wei, Bunyamin Sisman, Da Zheng, Christos Faloutsos, Xin Luna Dong, Jiawei Han*
+
 </details>
 
 ## Installation