fix warning...

TempMQTT/src/OutsideTempSensor.cpp

@@ -92,7 +92,7 @@ void loop() {
   float temperature = dht.getTemperature();
 
   const char* status=dht.getStatusString();
-  if (status=="OK") {
+  if (strcmp(status,"OK") == 0) {
     // allocate the memory for the document
     const size_t CAPACITY = JSON_OBJECT_SIZE(3);
     StaticJsonDocument<CAPACITY> doc;