Fix dependency in pins_arduino.h

without stdbool compilation on ESP32-S3-USB-OTG board examples fails.

Example:
esp32s3usbotg/pins_arduino.h:5:1: note: 'bool' is defined in header '<stdbool.h>'; did you forget to '#include <stdbool.h>'?
    4 | #include <stdint.h>
  +++ |+#include <stdbool.h>
    5 |

Author: complxdbg

variants/esp32/pins_arduino.h

@@ -2,6 +2,7 @@
 #define Pins_Arduino_h
 
 #include <stdint.h>
+#include <stdbool.h>
 
 static const uint8_t TX = 1;
 static const uint8_t RX = 3;