fix: Link to p5.sound/p5.Oscillator/

Author: ff6347

src/content/tutorials/en/getting-started-with-nodejs.mdx

@@ -231,7 +231,7 @@ Now you are ready to build the [Melody App](https://docs.google.com/document/u/0
 
 ## Next Steps
 
-- Read about the [`p5.Oscillator`](/reference/p5.Oscillator) library and play with [this example](https://editor.p5js.org/Msqcoding/sketches/wSFTn9G9E).
+- Read about the [`p5.Oscillator`](/reference/p5.sound/p5.Oscillator/) library and play with [this example](https://editor.p5js.org/Msqcoding/sketches/wSFTn9G9E).
 - Learn how to use [`app.post()`](https://expressjs.com/en/5x/api.html#app.post.method) and [`fs.writeFile()`](https://nodejs.org/en/learn/manipulating-files/writing-files-with-nodejs) to save files users create using your p5.js app by visiting the reference links.