update iotd for infrared detect

guowenxue

2021-04-22 4ff5fe054d3e9db5edf1eb8e9114729b5f7918a3

 modules/c/ds18b20.c

@@ -32,7 +32,7 @@
                return 1;
        }

        printf("DS19B20 get temperature: %f ℃\n", temp);
        printf("DS18B20 get temperature: %f ℃\n", temp);
        return 0;
}