fix: Link to ref group DOM

Author: ff6347

src/content/tutorials/en/simple-melody-app.mdx

@@ -1155,7 +1155,7 @@ For example, mapping to `50, 250` instead of `0, 360` will use a different segme
 
 To prepare for the next step, consider reviewing [p5.Element](/reference/p5.Element)s such as [createP()](/reference/p5/createP), [createSelect()](/reference/p5/createSelect), [createInput()](/reference/p5/createInput), and [createButton()](/reference/p5/createButton).  Also consider reviewing the MDN reference for [DOM elements](https://developer.mozilla.org/en-US/docs/Web/API/Document_Object_Model) and [html elements](https://developer.mozilla.org/en-US/docs/Web/HTML/Element).
 
-You can also review how to use and modify [DOM objects](/referencegroup-DOM) by visiting the [Creating and Styling HTML tutorial](/tutorials/creating-styling-html). 
+You can also review how to use and modify [DOM objects](/reference/#DOM) by visiting the [Creating and Styling HTML tutorial](/tutorials/creating-styling-html). 
 
 
 ### Step 7 – Add user input to customize melodies<a id="user-input"></a>