Fix getRed/setRed example to use HSL→RGB conversion (#42086)

* fix: correct getRed()/setRed() example using HSL→RGB conversion (#42059)

* Fix usage

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Co-authored-by: Joshua Chen <[email protected]>

Author: ShilpaG813

files/en-us/web/javascript/guide/using_classes/index.md

@@ -314,10 +314,12 @@ class Color {
     this.values = rgbToHSL([r, g, b]);
   }
   getRed() {
-    return this.values[0];
+    return hslToRGB(this.values)[0];
   }
   setRed(value) {
-    this.values[0] = value;
+    const rgb = hslToRGB(this.values);
+    rgb[0] = value;
+    this.values = rgbToHSL(rgb);
   }
 }