Update README.txt for IRT contact

README.txt

-
  *******************
  *** README AIDA ***
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 This repository contains the simulation model of the study case AIDA.
-It is provided by IRT Saint Exupéry under a Creative Commons BY-SA licence.
+It is provided by IRT Saint Exupéry under a Creative Commons BY-SA licence.
 This repository is managed in versioning throught git, with the following url
 
 https://sahara.pf.irt-saintexupery.com/
@@ -36,9 +35,7 @@ AIDA provides a reference study case representative of the complexity and critic
 systems.
 Our intent is to provide a repository to gather all AIDA modellings in order to share different approaches and tools.
 
-If you plan to use AIDA as a study case it would be kind to inform the IRT Saint-Exupery contacts below. We would be pleased to answer your questions.
-patrick.farail@irt-saintexupery.com
-estelle.saez@irt-saintexupery.com
+If you plan to use AIDA as a study case it would be kind to inform the IRT Saint-Exupery (systems-engineering@irt-saintexupery.com). We would be pleased to answer your questions.
 
 Currently, the following works use this use case :
 Prosvirnova, T., Saez, E., Seguin, C., Virelizier, P.: Handling consistency between safety and system models.