Bump htmlhint from 1.1.4 to 1.6.3

Bumps [htmlhint](https://github.com/htmlhint/HTMLHint) from 1.1.4 to 1.6.3.
- [Release notes](https://github.com/htmlhint/HTMLHint/releases)
- [Commits](htmlhint/HTMLHint@v1.1.4...v1.6.3)

---
updated-dependencies:
- dependency-name: htmlhint
  dependency-version: 1.6.3
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Author: dependabot[bot]