[BT] Fix BLE MQTT command trigger a reset (#1698)

Problem introduced with the bump of ESP32 platform from 3.5.0 to 6.1.0

main/config_BT.h

@@ -46,6 +46,7 @@ extern int btQueueLengthCount;
 /*-----------BT TOPICS & COMPILATION PARAMETERS-----------*/
 #define subjectBTtoMQTT    "/BTtoMQTT"
 #define subjectMQTTtoBTset "/commands/MQTTtoBT/config"
+#define subjectMQTTtoBT    "/commands/MQTTtoBT"
 // Uncomment to send undecoded device data to another gateway device for decoding
 // #define MQTTDecodeTopic    "undecoded"
 #ifndef UseExtDecoder