fix(test): fixing commentary about GPIO signal

Author: SuGlider

tests/validation/uart/uart.ino

@@ -498,7 +498,7 @@ void setup() {
 
   uart_test_configs = {
 #if SOC_UART_HP_NUM >= 2 && defined(RX1) && defined(TX1)
-// inverting RX1<->TX1 because ESP32-P4 has a problem with loopback on RX1 :: GPIO11 + UART_RX SGINAL
+// inverting RX1<->TX1 because ESP32-P4 has a problem with loopback on RX1 :: GPIO11 <-- UART_TX SGINAL
     new UARTTestConfig(1, Serial1, TX1, RX1),
 #endif
 #if SOC_UART_HP_NUM >= 3 && defined(RX2) && defined(TX2)