Update README.md

Author: andybbruno

README.md

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 Competition for the Data Mining course
 
 [Here](https://www.kaggle.com/c/data-mining-20192020-unipi/leaderboard)
-our results on Kaggle.
+our results on Kaggle. (Group - 12)
+
+Members of the group:
+
+- [Lorenzo Bellomo](https://github.com/LorenzoBellomo)
+- [Andrea Bruno](https://github.com/andybbruno)
+- [Marta Scalisi](https://github.com/martascalisi)
+- [Chiara Spampinato](https://github.com/ChiaraDM)
+
 
 ## Task
 - The challenge of this competition is to predict if the car purchased at the Auction is a good / bad buy.