release.sh: Make use of workaround to allow upload of other assets

This would set 'link_type' to 'other' explicitly, which the server side
expects and allow us to submit other assets.

From https://gitlab.com/gitlab-org/cli/-/issues/1154.

Uses a simple loop to append to each asset the link type.

Signed-off-by: Marius Vlad <marius.vlad@collabora.com>