Make clear in failure message that it fails the job

My MR changed 39 files. It isn't clear that https://gitlab.com/gitlab-org/gitlab/-/jobs/598598437 why that job failed by reading the message in the job log:

I had to read the script to check that it does indeed exit 1 to understand that that's the source of the failure.

Proposed fix

Suggest adding the word "failing" in the error message