Typo fix (#924)

Type in sending status command to MQTTtoRTL_433. "-1" should be "1" as it produces an error otherwise.

docs/use/rf.md

@@ -290,7 +290,7 @@ This function does not work when all available decoders are enabled and triggers
 
 ### Retrieve current status of receiver
 
-`home/OpenMQTTGateway/commands/MQTTtoRTL_433 {"status":-1}`
+`home/OpenMQTTGateway/commands/MQTTtoRTL_433 {"status":1}`
 
 ```
 {"model":"status",
@@ -308,4 +308,4 @@ This function does not work when all available decoders are enabled and triggers
 "pulses":0,                 - how many pulses have been recieved in the current signal
 "StackHighWaterMark":5528,  - ESP32 Stack
 "freeMem":112880}           - ESP32 memory available
-```
+```