Update username for Stefano in hsp-iit.yml

Author: pattacini

groups/hsp-iit.yml

@@ -68,7 +68,7 @@ hsp-iit/ergocub:
   - "gabrielecaddeo"
   - "randaz81"
   - "morpheus1820" #Stefano Rosa
-  - "steb6" #Stefano Bernagozzi
+  - "steb6" #Stefano Berti
   - "andrearosasco"
   - "SimoneMic"
   - "vigisushrutha23" #Vignesh Sushrutha Raghavan