Bump to 6.1.4

What does this MR do?

Bump to 6.1.4 to release a new version of Container Scanning based on Debian 12 (Update to Ruby 3.1 and Debian 12 (bookworm) (!2920 - merged))

What are the relevant issue numbers?

Does this MR meet the acceptance criteria?

• Changelog trailer added
• Documentation created/updated for GitLab EE, if necessary
• Documentation created/updated for this project, if necessary
• Documentation reviewed by technical writer or follow-up review issue created
• Tests added for this feature/bug
• Job definition updated, if necessary
  • Auto-DevOps template
  • Job definition example
  • CI Templates
• Conforms to the code review guidelines
• Conforms to the Go guidelines
• Security reports checked/validated by reviewer