Fix comment in p5.Oscillator reference example, https://p5js.org/reference/#/p5.Oscillator.
Fix comment in p5.Oscillator reference example, https://p5js.org/reference/#/p5.Oscillator.

therewasaguy/p5.js-sound,processing/p5.js-sound,therewasaguy/p5.js-sound,processing/p5.js-sound