docs(adr): update stale ms.date in 0009-anchor-vex-trust-to-reusable-workflow.md (#3220)

## Description

Updates the `ms.date` frontmatter in
`docs/planning/adrs/0009-anchor-vex-trust-to-reusable-workflow.md`
from `2026-07-03` to `2026-10-12`.

This PR is limited to refreshing stale date metadata. No architectural
decisions, VEX attestation guidance, or trust anchor references are
changed.
The ADR status remains `accepted`.

This update does not claim that the document's technical content has
been revalidated.

## Related Issue(s)

Fixes #3128

## Type of Change

**Code & Documentation:**

* [ ] Bug fix (non-breaking change fixing an issue)
* [ ] New feature (non-breaking change adding functionality)
* [ ] Breaking change (fix or feature causing existing functionality to
change)
* [x] Documentation update

**Infrastructure & Configuration:**

* [ ] GitHub Actions workflow
* [ ] Linting configuration (markdown, PowerShell, etc.)
* [ ] Security configuration
* [ ] DevContainer configuration
* [ ] Dependency update

**AI Artifacts:**

* [ ] Reviewed contribution with `hve-builder` and addressed all
actionable findings
* [ ] Copilot instructions (`.github/instructions/*.instructions.md`)
* [ ] Copilot prompt (`.github/prompts/*.prompt.md`)
* [ ] Copilot agent (`.github/agents/*.agent.md`)
* [ ] Copilot skill (`.github/skills/*/SKILL.md`)
* [ ] Copilot hook (`.github/hooks/*/*.json`)
* [ ] Eval spec added/updated for changed AI artifacts (`evals/`)

**Other:**

* [ ] Script/automation (`.ps1`, `.sh`, `.py`)
* [ ] Other (please describe):

## Testing

Reviewed the diff and confirmed that only the `ms.date` value changes.
Local validation results have not been confirmed; the corresponding
checks remain unchecked.

## Checklist

### Required Checks

* [x] Documentation is updated (if applicable)
* [x] Files follow existing naming conventions
* [x] Changes are backwards compatible (if applicable)
* [ ] Tests added for new functionality (if applicable)

No new functionality is introduced; additional tests are not applicable.

### AI Artifact Contributions

* [ ] Used `hve-builder` review mode to review contribution
* [ ] Addressed all actionable findings from the `hve-builder` review
* [ ] Verified contribution follows common standards and type-specific
requirements

Not applicable: this change updates ADR metadata, not AI artifacts.

### Required Local Checks

The following local-safe validation commands must pass before merging:

* [ ] Local validation aggregate: `npm run validate:local`
* [ ] Documentation validation (if docs changed): `npm run
validate:docs`
* [ ] Spell checking: `npm run spell-check`
* [ ] Link validation: `npm run lint:md-links`

## Security Considerations

* [x] This PR does not contain any sensitive or NDA information
* [ ] Any new dependencies have been reviewed for security issues
* [ ] Security-related scripts follow the principle of least privilege

No dependencies or security-related scripts are added or changed.
VEX attestation workflows and trust configuration are unchanged.

## Additional Notes

Any technical content corrections identified during review should be
tracked separately from this metadata-only change.

The Sample Prompts section is omitted because no AI artifacts are
changed.

Co-authored-by: Jamie Kim <jamiekim500@gmail.com>

Author: Fire162

docs/planning/adrs/0009-anchor-vex-trust-to-reusable-workflow.md

@@ -3,7 +3,7 @@ id: "0009"
 title: "Anchor VEX trust to the reusable VEX attestation workflow"
 description: "Move the published VEX trust anchor from the release workflow to the dedicated reusable VEX attestation workflow so verification and governance use the same signer identity."
 author: "HVE Core Maintainers"
-ms.date: "2026-07-03"
+ms.date: "2026-10-12"
 ms.topic: "reference"
 status: "accepted"
 proposed_date: "2026-07-03"