Add Yamcs 5.12.7 fix references for GHSA-2g95

[cookesan]

Adds Yamcs 5.12.7 fix references for GHSA-2g95 to GHSA-2g95-6x5q-xjwj.

Audit refresh, July 8, 2026:

• Confirmed the live PR is open, ready for review, merge-clean, and the visible advisory check is green.
• Rechecked the merge-base diff: exactly one advisory JSON file changes (advisories/github-reviewed/2026/05/GHSA-2g95-6x5q-xjwj/GHSA-2g95-6x5q-xjwj.json), JSON parses, git diff --check passes, and the exact-head worktree is clean.
• Revalidated the added public references and package-version evidence in the diff; all resolve through their source site or registry.

[cookesan]

Rechecked this reference-only PR while keeping the open Advisory Database queue current.

• The patch only adds the Yamcs yamcs-5.12.7 release reference and fix commit reference; it does not change affected ranges, package metadata, or severity.
• The release tag resolves as yamcs-5.12.7, and the commit resolves to 3c550348f866af4675d2ba4a51d8d12b7c7c6011.
• The commit subject matches the advisory context: Disable algorithm edit.

No other advisory fields are changed.