Show only 1 decimal for temperature & humidity

ampel-firmware/co2_sensor.cpp

@@ -120,9 +120,9 @@ namespace sensor {
     Serial.print(F("co2(ppm): "));
     Serial.print(co2);
     Serial.print(F(" temp(C): "));
-    Serial.print(temperature);
+    Serial.print(temperature, 1);
     Serial.print(F(" humidity(%): "));
-    Serial.println(humidity);
+    Serial.println(humidity, 1);
   }
 
   void displayCO2OnLedRing() {
@@ -145,7 +145,7 @@ namespace sensor {
   }
 
   /** Gets fresh data if available, checks calibration status, displays CO2 levels.
-   * Returns true if fresh data is available, for further processing (MQTT)
+   * Returns true if fresh data is available, for further processing (e.g. MQTT, CSV or LoRa)
    */
   bool processData() {
     bool freshData = scd30.dataAvailable();