docs: Update stale documentation - plugins/github/docs/templates/brd-template.md

[github-actions]

Stale Documentation Detected

File: plugins/github/docs/templates/brd-template.md
Current ms.date: 2026-01-28
Age: 96 days (threshold: 90 days)

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Workflow Run: https://github.com/microsoft/hve-core/actions/runs/25312579151
Detection Date: 2026-05-04

Action Required

• Review and update this documentation file
• Update ms.date frontmatter to current date
• Verify technical accuracy of content
• Close this issue manually after fixes are merged