Make serial port name const

AdaptiveBrightness/sensor_driver.hpp

@@ -24,7 +24,7 @@ class SensorDriver {
         static constexpr auto RANGE_CMD = std::string_view{"range"};
         static constexpr auto READ_CMD = std::string_view{"read csv"};
 
-        QString m_serialPortName;
+        const QString m_serialPortName;
 
         bool isValidSensor() const;