Upgrade: Bump @hint/utils from 7.0.15 to 7.0.21

Bumps [@hint/utils](https://github.com/webhintio/hint/tree/HEAD/packages/utils) from 7.0.15 to 7.0.21.
- [Release notes](https://github.com/webhintio/hint/releases)
- [Changelog](https://github.com/webhintio/hint/blob/main/packages/utils/CHANGELOG.md)
- [Commits](https://github.com/webhintio/hint/commits/HEAD/packages/utils)

---
updated-dependencies:
- dependency-name: "@hint/utils"
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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Close #1077

Author: dependabot[bot]