Fix changelog entry for 6.2.0

What does this MR do?

This MR makes the changelog entry for 6.2.0 more descriptive.

What are the relevant issue numbers?

Output GitLab metadata properties in Container ... (gitlab-org/gitlab#426356 - closed)

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