Fix default value of synthio.Note.amplitude in documentation.

Author: relic-se

shared-bindings/synthio/Note.c

@@ -40,7 +40,7 @@ static const mp_arg_t note_properties[] = {
 //|         waveform_loop_start: int = 0,
 //|         waveform_loop_end: int = waveform_max_length,
 //|         envelope: Optional[Envelope] = None,
-//|         amplitude: BlockInput = 0.0,
+//|         amplitude: BlockInput = 1.0,
 //|         bend: BlockInput = 0.0,
 //|         filter: Optional[Biquad] = None,
 //|         ring_frequency: float = 0.0,