Fix compilation error when USB CDC on Boot is enabled #2080
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When USB CDC on Boot is enabled on ESP32-C3, an compilation error occurs, because `Serial.begin()` takes only one (or zero) parameter. Check `ARDUINO_USB_CDC_ON_BOOT` and call it with the correct parameter.
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When USB CDC on Boot is enabled on ESP32-C3, an compilation error occurs, because
Serial.begin()takes only one (or zero) parameter.Check
ARDUINO_USB_CDC_ON_BOOTand call it with the correct parameter.