Bump web-features from 2.20.0 to 2.21.0

Bumps [web-features](https://github.com/web-platform-dx/web-features) from 2.20.0 to 2.21.0.
- [Release notes](https://github.com/web-platform-dx/web-features/releases)
- [Commits](web-platform-dx/web-features@v2.20.0...v2.21.0)

---
updated-dependencies:
- dependency-name: web-features
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>