Set the user language when adding the footer

Signed-off-by: Julius Härtl <jus@bitgrid.net>

apps/settings/lib/Mailer/NewUserMailHelper.php

@@ -149,7 +149,7 @@ public function generateTemplate(IUser $user, $generatePasswordResetToken = fals
 			$l10n->t('Install Client'),
 			$this->config->getSystemValue('customclient_desktop', 'https://nextcloud.com/install/#install-clients')
 		);
-		$emailTemplate->addFooter();
+		$emailTemplate->addFooter('', $lang);
 
 		return $emailTemplate;
 	}