Add sara to the default config.json, required for tests

Author: danieleTrimarchi

src/chargedPlanner/data/config.json

@@ -34,6 +34,10 @@
         {
             "devType": "Dev",
             "name": "Guillaume"
+        },
+        {
+            "devType": "Dev",
+            "name": "Sara"
         }
     ]
 }