work around GitLab bug

The latest GitLab release has a bug where i386 docker images can not be downloaded unless the platform is explicitly passed in. See https://gitlab.com/gitlab-org/gitlab/-/issues/504433

This change adds in that explicit platform and fixes the .deb jobs.

Edited Nov 30, 2024 by Adam

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information