Fix formatting in fibaro wall plug JSON file

Author: Salvialf

core/config/devices/fibaro_271/fgwpe.wall.plug.zw5.json

@@ -8,7 +8,7 @@
         "1538": [
             "4099",
             "4097",
-            "4100",
+            "4100"
         ]
     },
     "properties": {