Clarifying Temperature in Celsius

Co-authored-by: jposada202020 <[email protected]>

Author: KeithTheEE

adafruit_sgp40.py

@@ -104,7 +104,7 @@ class SGP40:
         Humidity compensation is further optimized for a subset of the temperature
         and relative humidity readings. See Figure 3 of the Sensirion datasheet for
         the SGP40. At 25 degrees Celsius, the optimal range for relative humidity is 8% to 90%.
-        At 50% relative humidity, the optimal range for temperature is -7 to 42 deg C.
+        At 50% relative humidity, the optimal range for temperature is -7 to 42 degrees Celsius.
 
         Prolonged exposures outside of these ranges may reduce sensor performance, and
         the sensor must not be exposed towards condensing conditions at any time.