Add submit button to test form validation

Author: AlanGit-debug2604

Form-Controls/index.html

@@ -37,6 +37,7 @@ <h1>Product Pick</h1>
           <option value="XL">XL</option>
           <option value="XXL">XXL</option>
         </select>
+        <button type="submit">Submit</button>
       </form>
     </main>
     <footer>