Fix the release of helper images script
What does this MR do?
gitlab/gitlab-runner-helper release script broken by !831 (merged).
Why was this MR needed?
Are there points in the code the reviewer needs to double check?
Does this MR meet the acceptance criteria?
- Documentation created/updated
- Added for this feature/bug
- All builds are passing
Branch has no merge conflicts with
master(if you do - rebase it please)