ruby30 will be removed before September and ruby31 is already the default.
commit d8f697b2ff73c548b97792d350008ee06e459976 Author: Hans de Graaff <graaff@gentoo.org> Date: Sun Jun 25 17:57:50 2023 +0200 app-admin/fluentd: enable ruby31 Signed-off-by: Hans de Graaff <graaff@gentoo.org>