Update README.md

Author: deepcoder

README.md

@@ -34,7 +34,7 @@ Example JSON published to MQTT topic:
 ```
 {"timestamp":"20201206025836","mac-address":"A4:D4:38:25:BD:61","rssi":-69,"temperature":64.4,"units":"F","temperature-celsius":18.0,"humidity":44.0,"battery-pct":93,"sensor-name":"","location":"H5072 Kitchen","sensor-type":"3"}
 ```
-At the top of each hour the program will publish a count of the total number of advertising packets seen for each sensor in the prior hour. This is useful to check the bluetooth frequency reception for each sensor as well as the quality and frequency of readings for each sensor type. The sub topic for this is:
+At the top of each hour the program will publish a count of the total number of advertising packets seen for each sensor in the prior hour to MQTT. This is useful to check the bluetooth frequency reception for each sensor as well as the quality and frequency of readings for each sensor type. The sub topic for this is:
 ```
 $SYS/hour-stats
 ```