Remove duplicate GHSA-hm82 reference

[cookesan]

Removes the malformed duplicate WhiteSource reference from GHSA-hm82-qr45-h7mw while leaving the clean CVE-2020-28269 reference intact.

Audit refresh, July 8, 2026:

• Confirmed the advisory still retains the clean WhiteSource URL, NVD URL, and upstream source reference.
• Confirmed the GHSA and NVD records for CVE-2020-28269 still resolve.
• Local checks passed: one advisory JSON file changed in the PR diff, JSON parses, git diff --check passes, and the worktree is clean.