Upgrade report to v6.2.1

What does this MR do?

Upgrade report/v6 version [v6.2.0 => v6.2.1]. This ensures that the "primary identifier" with type: kics_id is always the first element in vulnerabilities[].identifiers[].

Note: the kics analyzer was not impacted by this bug because theidentifiers list only ever contains a single element.

What are the relevant issue numbers?

• GitLab Semgrep and Spotbugs analyzers are causi... (gitlab-org/gitlab#573266 - closed) • Adam Cohen • 18.5
• https://gitlab.com/gitlab-com/request-for-help/-/issues/3457+s

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