Add Peter name to RCP group admin

Author: MichelDucartier

docs/clusters/rcp.md

@@ -2,7 +2,7 @@
 
 ## 1. Pre-setup (access to scratch and cluster)
 
-Please ask Mark to add you to the corresponding groups. You can check your groups at https://groups.epfl.ch/
+Please ask [Mark](mark.wagner@epfl.ch) or [Peter](peter.ahumuza@epfl.ch) to add you to the corresponding groups. You can check your groups at https://groups.epfl.ch/
 
 ## 2. Setting-up credentials