Update readme

README.md

@@ -6,10 +6,11 @@ Configure Wifi credentials on IOT devices using [Improv](https://www.improv-wifi
 Usage: improv-setup device [OPTIONS] <PATH> [COMMAND]
 
 Commands:
-  state     Request current state
-  set-wifi  Set wifi credentials
-  info      Request device info
-  help      Print this message or the help of the given subcommand(s)
+  state    Request current state
+  connect  Connect to wifi network
+  info     Request device info
+  scan     WiFi networks visible to device
+  help     Print this message or the help of the given subcommand(s)
 
 Arguments:
   <PATH>  Path to the serial device