Document Markdown publication export - #710

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@v4. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

[vale] reported by reviewdog 🐶 [write-good.Passive] 'are omitted' may be passive voice. Use active voice if you can. Raw Output: {"message": "[write-good.Passive] 'are omitted' may be passive voice. Use active voice if you can.", "location": {"path": "en/collaborative-work/export/README.md", "range": {"start": {"line": 54, "column": 77}}}, "severity": "WARNING"}

[vale] reported by reviewdog 🐶 [write-good.Passive] 'be resolved' may be passive voice. Use active voice if you can. Raw Output: {"message": "[write-good.Passive] 'be resolved' may be passive voice. Use active voice if you can.", "location": {"path": "en/collaborative-work/export/README.md", "range": {"start": {"line": 54, "column": 31}}}, "severity": "WARNING"}

[vale] reported by reviewdog 🐶 [write-good.TooWordy] 'retain' is too wordy. Raw Output: {"message": "[write-good.TooWordy] 'retain' is too wordy.", "location": {"path": "en/collaborative-work/export/README.md", "range": {"start": {"line": 50, "column": 13}}}, "severity": "WARNING"}

[vale] reported by reviewdog 🐶 [write-good.Passive] 'are omitted' may be passive voice. Use active voice if you can. Raw Output: {"message": "[write-good.Passive] 'are omitted' may be passive voice. Use active voice if you can.", "location": {"path": "en/collaborative-work/export/README.md", "range": {"start": {"line": 43, "column": 16}}}, "severity": "WARNING"}

[vale] reported by reviewdog 🐶 [write-good.Passive] 'is used' may be passive voice. Use active voice if you can. Raw Output: {"message": "[write-good.Passive] 'is used' may be passive voice. Use active voice if you can.", "location": {"path": "en/collaborative-work/export/README.md", "range": {"start": {"line": 41, "column": 48}}}, "severity": "WARNING"}