Fix 404 error when visit group label edit page

What does this MR do?

Fix 404 error when visit group label edit page

Are there points in the code the reviewer needs to double check?

no

Screenshots (if relevant)

no

Does this MR meet the acceptance criteria?

• Changelog entry added not needed because bug is master only
• Documentation created/updated
• API support added
• Tests
  • Added for this feature/bug
  • All builds are passing
• Conform by the merge request performance guides
• Conform by the style guides
• Branch has no merge conflicts with master (if it does - rebase it please)
• Squashed related commits together

What are the relevant issue numbers?

Fixes https://gitlab.com/gitlab-org/gitlab-ce/issues/25158