Defined id manually for .gitlab-ci.yml header

What does this MR do?

Fixes anchor link for .gitlab-ci.yml header

Are there points in the code the reviewer needs to double check?

Just check that ids are now match (I edited file from browser)

Why was this MR needed?

Link to .gitlab-ci.yml section is not working. This MR fixes it

Does this MR meet the acceptance criteria?

• CHANGELOG entry added
• Documentation created/updated
• API support added
• Tests
  • Added for this feature/bug
  • All builds are passing
• Conform by the style guides
• Branch has no merge conflicts with master (if you do - rebase it please)
• Squashed related commits together