chore(deps-dev): bump vega-embed from 6.20.8 to 6.21.0 (#8235)
chore(deps-dev): bump vega-embed from 6.20.8 to 6.21.0 (#8235)

Bumps [vega-embed](https://github.com/vega/vega-embed) from 6.20.8 to 6.21.0.
- [Release notes](https://github.com/vega/vega-embed/releases)
- [Changelog](https://github.com/vega/vega-embed/blob/v6.21.0/CHANGELOG.md)
- [Commits](https://github.com/vega/vega-embed/compare/v6.20.8...v6.21.0)

---
updated-dependencies:
- dependency-name: vega-embed
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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Co-authored-by: dependabot[bot] <1c358da00a777d4e9898c1280ab801e2df165188@users.noreply.github.com>
vega/vega-lite,vega/vega-lite,vega/vega-lite,vega/vega-lite,vega/vega-lite