message: Add documentation step to CHECKLIST
diff: ## Checklist for publishing
  1. Update [CHANGELOG.md](CHANGELOG.md) with changes per [Keep a Changelog format](https://keepachangelog.com/)
  -2. Run `yarn lerna version [major|minor|patch|prerelease] --no-push` (also runs the `version` script in [`./package.json`](package.json) before committing and tagging)
  -3. Check that all the `dependencies` have the new version number
  -4. Run `yarn lerna publish from-git` (with `--dist-tag next` if version is `prerelease`)
  +2. Update documentation in `react-querybuilder.github.io` repo
  +3. Run `yarn lerna version [major|minor|patch|prerelease] --no-push` (also runs the `version` script in [`./package.json`](package.json) before committing and tagging)
  +4. Check that all the `dependencies` have the new version number
  +5. Run `yarn lerna publish from-git` (with `--dist-tag next` if version is `prerelease`)
  