Correcting RX1 to GPIO4 and TX1 to GPIO5 to be consistent with documentation. Previous pin use works but is inconsistent with C6 docs.

Author: petergjoel

Diff for: cores/esp32/HardwareSerial.cpp

@@ -64,7 +64,7 @@ void serialEvent(void) {}
 #elif CONFIG_IDF_TARGET_ESP32S3
 #define RX1 15
 #elif CONFIG_IDF_TARGET_ESP32C6
-#define RX1 5
+#define RX1 4
 #elif CONFIG_IDF_TARGET_ESP32H2
 #define RX1 0
 #endif
@@ -80,7 +80,7 @@ void serialEvent(void) {}
 #elif CONFIG_IDF_TARGET_ESP32S3
 #define TX1 16
 #elif CONFIG_IDF_TARGET_ESP32C6
-#define TX1 4
+#define TX1 5
 #elif CONFIG_IDF_TARGET_ESP32H2
 #define TX1 1
 #endif