Add Tiger cub volunteer warning

public/parts/signup.php

@@ -117,6 +117,7 @@ if (isset($_SESSION['familyid']) && $database->has('families', ['familyid' => $_
                         <i class="fas fa-plus"></i> Add Adult
                     </div>
                     <div>
+                        <i class="fas fa-info-circle fa-fw"></i> Do not register as a volunteer if you are attending with your Tiger cub, instead enter your name as the camper's parent/guardian.<br />
                         <i class="fas fa-calendar-alt fa-fw"></i> A $10 discount is applied for every day an adult volunteers.<br />
                         <?php
                         if ($SETTINGS["prices"]["adult_tshirt"] === false) {