core/templates/update.use-cli.php
<div class="update" data-productname="<?php p($_['productName']) ?>" data-version="<?php p($_['version']) ?>">
<div class="updateOverview">
<h2 class="title"><?php p($l->t('Upgrade needed')) ?></h2>
<div class="infogroup">
<?php if ($_['tooBig']) {
p($l->t('It looks like your instance may host many files and/or users. To ensure a smooth upgrade process, please use the command line upgrade command (occ upgrade).'));
} else {
p($l->t('Automatic upgrading is not enabled in config.php. To upgrade your instance, please use the command line updater (occ upgrade).'));
} ?><br><br>
<?php
print_unescaped($l->t('For help, see the <a target="_blank" rel="noreferrer" href="%s">documentation</a>.', [link_to_docs(\OCP\Constants::DOCS_ADMIN_CLI_UPGRADE)])); ?><br><br>
</div>
</div>
</div>