fix if top version

data/iftop.json

@@ -1,5 +1,5 @@
 {
-  "description": "This requires 'iftop' 1.17 and the privilege to capture on some device (specify with '-i' if needed) .",
+  "description": "This requires 'iftop' 0.17 and the privilege to capture on some device (specify with '-i' if needed) .",
   "functions": {
     "shell": [
       {
@@ -17,4 +17,4 @@
       }
     ]
   }
-}
+}