feat: integrate release-doc-sync to keep release docs aligned

[TMHSDigital]

Integrates the release-doc-sync@v1.0 composite action from TMHSDigital/Developer-Tools-Directory into Docker's release.yml.

The action runs inside release.yml after plugin.json is bumped, editing CHANGELOG.md, CLAUDE.md, and ROADMAP.md to reflect the new version. The existing commit-and-tag step picks up the doc changes.

This is the smoke test for Phase 2b of the doc-consistency cluster resolution (TMHSDigital/Developer-Tools-Directory#5). After this PR merges, the next auto-release will exercise the action end-to-end.

The PR's own CI does NOT exercise release-doc-sync directly — the action only runs as part of release.yml on push to main. The PR's CI validates the workflow YAML and the integration shape.

What the new step does

- name: Sync release docs
  if: steps.check.outputs.skip == 'false'
  uses: TMHSDigital/Developer-Tools-Directory/.github/actions/release-doc-sync@v1.0
  with:
    plugin-version: ${{ steps.new.outputs.version }}
    previous-version: ${{ steps.current.outputs.version }}

Runs between "Update version files" (which bumps plugin.json + the README badge) and "Commit and tag" (which git add -A picks up the doc edits).

Refs TMHSDigital/Developer-Tools-Directory#5.

[github-actions]

Dependency Review

The following issues were found:

• ✅ 0 vulnerable package(s)
• ✅ 0 package(s) with incompatible licenses
• ✅ 0 package(s) with invalid SPDX license definitions
• ⚠️ 1 package(s) with unknown licenses.

See the Details below.

License Issues

.github/workflows/release.yml

Package	Version	License	Issue Type
TMHSDigital/Developer-Tools-Directory/.github/actions/release-doc-sync	1.0.*	Null	Unknown License

OpenSSF Scorecard

Package	Version	Score	Details
actions/TMHSDigital/Developer-Tools-Directory/.github/actions/release-doc-sync	1.0.*	Unknown	Unknown

Scanned Files

• .github/workflows/release.yml