Fix primary identifier bug

What does this MR do?

Fix primary identifier bug by upgrading report/v6 version [v6.2.0 => v6.2.1]. This ensures that the "primary identifier" containing type: find_sec_bugs_type is always the first element in vulnerabilities[].identifiers[].

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
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  • Job definition example
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• Conforms to the code review guidelines
• Conforms to the Go guidelines
• Security reports checked/validated by reviewer