Fix headers passed when using CI_JOB_TOKEN

Balasankar 'Balu' Crequested to merge
fix-ci-job-token-header into main

What does this MR do?

Fix headers passed when using CI_JOB_TOKEN.

Why was this MR needed?

Before this MR, we were incorrectly using CI-JOB-TOKEN as header when it should have been JOB-TOKEN.

What's the best way to test this MR?

What are the relevant issue numbers?

https://gitlab.com/gitlab-org/gitlab-runner/-/work_items/39121

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