doc: update usb pins and provide a note in api-reference/uart

docs/en/api-guides/usb-serial-jtag-console.rst

@@ -13,8 +13,8 @@ Note that, in contrast with the USB OTG peripheral in some Espressif chips, the
 Hardware Requirements
 =====================
 
-{IDF_TARGET_USB_DP_GPIO:default="Not Updated!",esp32c3="18",esp32s3="19"}
-{IDF_TARGET_USB_DM_GPIO:default="Not Updated!",esp32c3="19",esp32s3="20"}
+{IDF_TARGET_USB_DP_GPIO:default="Not Updated!",esp32c3="19",esp32s3="20"}
+{IDF_TARGET_USB_DM_GPIO:default="Not Updated!",esp32c3="18",esp32s3="19"}
 
 Connect {IDF_TARGET_NAME} to the USB port as follows:
 

docs/en/api-reference/peripherals/uart.rst

@@ -62,6 +62,7 @@ Call the function :cpp:func:`uart_param_config` and pass to it a :cpp:type:`uart
     // Configure UART parameters
     ESP_ERROR_CHECK(uart_param_config(uart_num, &uart_config));
 
+For more information on how to configure the hardware flow control options, please refer to :example:`peripherals/uart/uart_echo`.
 
 Multiple Steps
 """"""""""""""