Fix more templates

Signed-off-by: Roeland Jago Douma <roeland@famdouma.nl>

core/templates/installation.php

@@ -31,7 +31,7 @@ script('core', [
 		<p><?php p($l->t('Your data directory and files are probably accessible from the internet because the .htaccess file does not work.'));?><br>
 		<?php print_unescaped($l->t(
 			'For information how to properly configure your server, please see the <a href="%s" target="_blank" rel="noreferrer noopener">documentation</a>.',
-			link_to_docs('admin-install')
+			[link_to_docs('admin-install')]
 		)); ?></p>
 	</fieldset>
 	<?php endif; ?>