Update README.md

Author: FilippoMB

README.md

@@ -6,7 +6,7 @@ This code reproduces the experimental results obtained with the MinCutPool layer
 as presented in the ICML 2020 paper 
 
 [Spectral Clustering with Graph Neural Networks for Graph Pooling](https://arxiv.org/abs/1907.00481)  
-F. M. Bianchi, D. Grattarola, C. Alippi
+F. M. Bianchi*, D. Grattarola*, C. Alippi
 
 The official implementation of the MinCutPool layer can be found in 
 [Spektral](https://graphneural.network/layers/pooling/#mincutpool).