Fix SS pin in ESP32 HW SPI (#13781)

Marlin/src/HAL/HAL_ESP32/spi_pins.h

@@ -18,7 +18,7 @@
  */
 #pragma once
 
-#define SS_PIN    5
+#define SS_PIN   SDSS
 #define SCK_PIN  18
 #define MISO_PIN 19
 #define MOSI_PIN 23

Marlin/src/pins/pins_ESP32.h

@@ -72,3 +72,6 @@
 #define HEATER_0_PIN         2
 #define FAN_PIN             13
 #define HEATER_BED_PIN       4
+
+// SPI
+#define SDSS                 5