@CDarius found hte correct backlight PWM

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

Author: jamesjnadeau

ports/espressif/boards/m5stack_cardputer/board.c

@@ -104,7 +104,7 @@ void board_init(void) {
         60,             // native_frames_per_second
         true,           // backlight_on_high
         false,          // SH1107_addressing
-        50000           // backlight pwm frequency
+        350             // backlight pwm frequency
         );
 }