GitLab objecting to container_scanning

@sandeep For some reason gitlab started objecting to the CI container_scanning attribute.

https://gitlab.ebi.ac.uk/emblorg/html-sites/embl-jobs-pages/-/pipelines/90364

Found errors in your .gitlab-ci.yml:
jobs:container_scanning config key may not be used with `rules`: only
You can also test your .gitlab-ci.yml in CI Lint

Reading the docs, this is a false error. I've temporarily disabled it to continue development: 5dbef805