Activate the What's New highlights step that condenses each release's
Features into <=8 short bullets and injects a <!-- whatsnew --> block the
app reads (utils/whatsNew.parseWhatsNew), with a deterministic fallback.
Runs as a needs: job inside the release-please workflows rather than on a
standalone release: published trigger, because release-please creates the
release with GITHUB_TOKEN and GitHub never starts new workflow runs from
token-generated events -- a standalone trigger would never fire. Shared as
a reusable workflow_call so the stable and beta channels stay in sync.
Best-effort: continue-on-error + fallback mean it can never break a release.
Requires GitHub Models enabled for the org; until then the fallback is used.