Use report schema version 14.0.0

What does this MR do?

Report JSON schema validation is coming soon. This MR brings the semgrep analyzer up to the most recent version of the json schema (14.0.0).l

What are the relevant issue numbers?

• gitlab-org/gitlab#324708 (closed)

Does this MR meet the acceptance criteria?

• Changelog entry 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