docs(): value for toggle and checkbox (#16102)

* docs(): value for toggle and checkbox

fixes #16074

* update docs

core/src/components/checkbox/checkbox.tsx

@@ -50,7 +50,12 @@ export class Checkbox implements ComponentInterface {
   @Prop() disabled = false;
 
   /**
-   * The value of the checkbox.
+   * The value of the toggle does not mean if it's checked or not, use the `checked`
+   * property for that.
+   *
+   * The value of a toggle is analogous to the value of a `<input type="checkbox">`,
+   * it's only used when the toggle participates in a native `<form>`.
+   * Defaults to `on`.
    */
   @Prop() value = 'on';