kit 6.3.1

Fixed

• The 6.3.0 first-publish of the adapter SDK and plugins failed provenance
  validation. npm's sigstore check requires each workspace package.json to
  carry a repository.url matching the provenance source
  (https://github.com/sandstream/kit); the field was empty, so the registry
  rejected sandstream-kit-adapter-sdk with E422 and the eleven plugins never
  ran (the CLI itself published). All thirteen manifests now declare
  repository (with the monorepo directory field); the publish step is
  idempotent, so this tag completes the set the 6.3.0 tag started.

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Full changelog: https://github.com/sandstream/kit/blob/v6.3.1/CHANGELOG.md

Verify this release:

git tag -v v6.3.1
npm audit signatures