add comment for required fields

Author: sheida-shab

Form-Controls/index.html

@@ -58,7 +58,7 @@ <h1>Product Pick</h1>
         <button type="submit">Add to basket</button>
         <button type="reset">Clear Form</button>
       </fieldset>
-
+      <label>required fields are marked by *</label>
     </form>
   </main>
   <footer>