Fix waiting script of the release_package job
The following discussion from !4934 should be addressed:
- [ ] @Alexand started a [discussion](https://gitlab.com/gitlab-org/charts/gitlab/-/merge_requests/4934#note_3257638426): (+3 comments)
> I think this broke chart releases: https://dev.gitlab.org/gitlab/charts/gitlab/-/jobs/35772796
>
> We're missing a helm binary in the job?
>
> cc @jennykim-gitlab @rpereira2 @siddharthkannan
issue