CiviSepa: new 1.5 release not being released on c.o

I just released CiviSEPA 1.5 (https://github.com/Project60/org.project60.sepa/releases/tag/1.5), but the release doesn't show up in the extension directory (https://civicrm.org/extensions/civisepa-sepa-direct-debit-extension).

cc @BjoernE