Update storybook/src/components/Dialog/Dialog.docs.mdx

Co-authored-by: Aram <[email protected]>

storybook/src/components/Dialog/Dialog.docs.mdx

@@ -21,6 +21,7 @@ This closes the Dialog when submitting the form.
 Pass the submit Button to the `footer` prop,
 and link it to the form by passing its `id` to the Buttons `form` attribute.
 The Dialog returns the value of the submit Button, so you can check which Button was clicked.
+For more information, see [Handling the return value from the dialog (MDN)](https://developer.mozilla.org/en-US/docs/Web/HTML/Element/dialog#handling_the_return_value_from_the_dialog).
 
 <Canvas of={DialogStories.FormDialog} />