Update src/color/p5.Color.js

Author: perminder-17

src/color/p5.Color.js

@@ -633,7 +633,7 @@ class Color {
   /**
    * Brightness obtains the HSB brightness value from either a p5.Color object,
    * an array of color components, or a CSS color string.Depending on value,
-   * wwhen `colorMode()` is set to HSB, this function will return the
+   * when `colorMode()` is set to HSB, this function will return the
    * brightness value in the range. By default, this function will return
    * the HSB brightness within the range 0 - 100.
    */