Fixes broken link on gitlab-ci-yaml include documentation

What does this MR do?

Fixes broken link on gitlab-ci-yaml include documentation

Does this MR meet the acceptance criteria?

• Documentation created/updated
• Review
  • Has been reviewed by Backend
• Conform by the merge request performance guides
• Conform by the style guides
• Squashed related commits together
• Internationalization required/considered
• End-to-end tests pass (package-qa manual pipeline job)