chore: update README

the other Zama repositories have Zama as author, let's do the same here.

README.md

@@ -175,7 +175,7 @@ To cite Concrete ML, notably in academic papers, please use the following entry,
 ```text
 @Misc{ConcreteML,
   title={Concrete {ML}: a Privacy-Preserving Machine Learning Library using Fully Homomorphic Encryption for Data Scientists},
-  author={Arthur Meyre and Benoit {Chevallier-Mames} and Jordan Frery and Andrei Stoian and Roman Bredehoft and Luis Montero and Celia Kherfallah},
+  author={Zama},
   year={2022},
   note={\url{https://github.com/zama-ai/concrete-ml}},
 }