chore: upgrade tar to ^7.5.20 to address CVE-2026-59874#1472

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mainsourcebot-dev/sourcebot:mainfrom

linear/sou-1554-sourcebot-devsourcebot-cve-2026-59874-tar-node-tar-56dcsourcebot-dev/sourcebot:linear/sou-1554-sourcebot-devsourcebot-cve-2026-59874-tar-node-tar-56dcCopy head branch name to clipboard