Flesh out WG chairs expectations in the bylaws

[HarHarLinks]

🎩 Vice Chair of The Matrix.org Foundation Governing Board

Reference (non-public link): https://matrix.discourse.group/t/flesh-out-wg-chairs-expectations-in-the-bylaws/161/4

CC @GregSutcliffe

This updates the bylaws of the Governing Board as decided on 2025-07-27, effective immediately.

As a follow-up, we might want to announce this to the world via TWIM, as it is intended to make it more accessible to the wider public to understand better how our working groups work.

✔️ Checklist

• Check for common mistakes:
  • Wrap plain URLs in <> to linkify them (learn more).
  • Use the right level of headings: The page title will use a level 1 headings, so your headings should use level 2 and below.
  • Use internal links: when linking to another page on https://matrix.org, use absolute [label](/target) or relative [label](subpage) links.
• For blog posts:
  • Verify the date and post ordering on the /blog page, especially for multiple posts on the same day. Prefer UTC format, e.g. 2025-12-01T14:00:00Z for Dec 1st, 2025, 2pm UTC.
  • Set the correct author and category. Browse existing ones at https://matrix.org/author/ and https://matrix.org/category/ to match them.
• Let us know if you are contributing in a specific role, such as on behalf of an organisation or team, for example.
• Let us know if your PR is time-sensitive in any way.
• Mention any issues related to the PR. Use GitHub keywords as appropriate.
• Your individual commits or pull request is signed off.

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[TobiasFella]

LGTM in that it matches what the committee has voted on