pinMatrixInDetach() has wrong parameter (#5385)

Fixes #5112
Call to pinMatrixInDetach() was changed from version 1.0.6 in version 2.0.0 injecting a bug as seen in cores/esp32/esp32-hal-uart.c
https://github.com/espressif/arduino-esp32/commit/80418fadcfb91c75d5100a8fddeb9318a8ef7d42Co-authored-by: Me No Dev <me-no-dev@users.noreply.github.com>

cores/esp32/esp32-hal-uart.c

@@ -179,7 +179,7 @@ static void uartDetachRx(uart_t* uart, uint8_t rxPin)
     if(uart == NULL) {
         return;
     }
-    pinMatrixInDetach(rxPin, false, false);
+    pinMatrixInDetach(UART_RXD_IDX(uart->num), false, false);
     uartDisableInterrupt(uart);
 }