Update switch.mqtt.markdown (home-assistant#1923)

Landrash · fabaff · commit ba09360ce47c · 2017-01-30T22:27:25.000+01:00
Fix `mosquitto_pub` example to work with example code.
diff --git a/source/_components/switch.mqtt.markdown b/source/_components/switch.mqtt.markdown
@@ -71,5 +71,5 @@ switch:
 For a check you can use the command line tools `mosquitto_pub` shipped with `mosquitto` to send MQTT messages. This allows you to operate your switch manually:
 
 ```bash
-$  mosquitto_pub -h 127.0.0.1 -t home/bedroom/switch1set -m "ON"
+$  mosquitto_pub -h 127.0.0.1 -t home/bedroom/switch1 -m "ON"
 ```
