Add heading to account access page

Signed-off-by: Jan-Christoph Borchardt <hey@jancborchardt.net>

core/templates/loginflow/authpicker.php

@@ -28,6 +28,7 @@ $urlGenerator = $_['urlGenerator'];
 ?>
 
 <div class="picker-window">
+	<h2><?php p($l->t('Account access')) ?></h2>
 	<p class="info">
 		<?php p($l->t('You are about to grant "%s" access to your %s account.', [$_['client'], $_['instanceName']])) ?>
 	</p>