Update PrinterMiscPanel to modify G-code scripts for LCD and BEEPER control

- Changed the script for controlling the LCD backlight to use the SET_PIN command with the appropriate pin name.
- Updated the BEEPER control script to utilize the SET_PIN command, adjusting the value format for consistency in handling sound output.

src/components/Dashboard/common/PrinterMiscPanel.jsx

@@ -103,7 +103,7 @@ const PrinterMiscPanel = ({
       sendObjectAction(id, 'printer', {
         type: 'gcodeScript',
         data: {
-          script: `SET_LCD LCD=lcd_backlight BRIGHTNESS=${value}`
+          script: `SET_PIN PIN=LCD_backlight_pin VALUE=${value}`
         }
       })
     }
@@ -114,7 +114,7 @@ const PrinterMiscPanel = ({
       sendObjectAction(id, 'printer', {
         type: 'gcodeScript',
         data: {
-          script: `M300 S440 P200 V${Math.round(value * 100)}`
+          script: `SET_PIN PIN=BEEPER_pin VALUE=${Math.round(value * 1000)}.00`
         }
       })
     }