update mqttd main program

guowenxue

2019-03-25 0603c4946b5b70a9c5d65ba5f0628ff6bad58cd7

 mqttd/main.c

@@ -60,7 +60,7 @@
        }
        else
        {
            printf("SHT2X Temperature=%lf ℃ relative humidity=%lf%\n", temp, rh);
            printf("SHT2X Temperature=%lfC, Relative humidity=%lf%% \n", temp, rh);
        }