Update mqtt.markdown (#35284)

source/_integrations/mqtt.markdown

@@ -215,7 +215,7 @@ MQTT Birth and Last Will messages can be customized or disabled from the UI. To
 
 ## Testing your setup
 
-The `mosquitto` broker package ships command line tools (often as `*-clients` package) to send and receive MQTT messages. For sending test messages to a broker running on `localhost`, to can use [`mosquitto_pub`](https://mosquitto.org/man/mosquitto_pub-1.html), check the example below:
+The `mosquitto` broker package ships command line tools (often as `*-clients` package) to send and receive MQTT messages. For sending test messages to a broker running on `localhost`, you can use [`mosquitto_pub`](https://mosquitto.org/man/mosquitto_pub-1.html), check the example below:
 
 ```bash
 mosquitto_pub -h 127.0.0.1 -t homeassistant/switch/1/on -m "Switch is ON"