[ig/wai] WAI IG recharter

[w3cbot]

This issue was created because the 'horizontal review requested' label was added to w3c/strategy#441
\nThis review is requested prior to the Advisory Committee Review.
\n# Charter Review

Charter

Diff from charter template

Diff from previous charter

Chair dashboard

What kind of charter is this? Check the relevant box / remove irrelevant branches.

• Existing IG recharter
  If this is a charter extension or revision, link a coming later diff from previous charter, and any issue discussion: none.

Horizontal Reviews: apply the Github label Horizontal review requested to request reviews for accessibility (a11y), internationalization (i18n), privacy, and security. @@todo: Also add a card for this issue to the Strategy Funnel.

Communities suggested for outreach

None at this time.

Known or potential areas of concern

None at this time.

This is request for an extension of the existing charter so we can propose a new charter. We don't expect any substantive changes to that charter.

Where would charter proponents like to see issues raised? (this strategy funnel issue, a different github repo, email, ...)

https://github.com/w3c/charter-drafts/issues?q=in%3Atitle%20ig%2Fwai

Anything else we should think about as we review?

The new charter extends the group for three years and aligns with the latest charter template. There are no other material changes.