Update Configuration_adv.h

LIGHT_NO_BRIGHTNESS

Marlin/Configuration_adv.h

@@ -487,7 +487,7 @@
   #define CASE_LIGHT_DEFAULT_BRIGHTNESS 255   // Set default power-up brightness (0-255, requires PWM pin)
   #define CASE_LIGHT_MAX_PWM 255              // Limit pwm
   #define CASE_LIGHT_MENU                   // Add Case Light options to the LCD menu
-  //#define CASE_LIGHT_NO_BRIGHTNESS          // Disable brightness control. Enable for non-PWM lighting.
+  #define CASE_LIGHT_NO_BRIGHTNESS          // Disable brightness control. Enable for non-PWM lighting.
   //#define CASE_LIGHT_USE_NEOPIXEL           // Use Neopixel LED as case light, requires NEOPIXEL_LED.
   #if ENABLED(CASE_LIGHT_USE_NEOPIXEL)
     #define CASE_LIGHT_NEOPIXEL_COLOR { 255, 255, 255, 255 } // { Red, Green, Blue, White }