Update github_changelog_generator requirement from 1.16.2 to 1.16.4
Update github_changelog_generator requirement from 1.16.2 to 1.16.4

Updates the requirements on [github_changelog_generator](https://github.com/github-changelog-generator/Github-Changelog-Generator) to permit the latest version.
- [Release notes](https://github.com/github-changelog-generator/Github-Changelog-Generator/releases)
- [Changelog](https://github.com/github-changelog-generator/github-changelog-generator/blob/master/CHANGELOG.md)
- [Commits](https://github.com/github-changelog-generator/Github-Changelog-Generator/compare/v1.16.2...v1.16.4)

---
updated-dependencies:
- dependency-name: github_changelog_generator
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
test-kitchen/kitchen-pester