build(deps-dev): bump @pattern-lab/starterkit-handlebars-demo

Bumps [@pattern-lab/starterkit-handlebars-demo](https://github.com/pattern-lab/patternlab-node) from 5.16.2 to 5.16.4.
- [Release notes](https://github.com/pattern-lab/patternlab-node/releases)
- [Changelog](https://github.com/pattern-lab/patternlab-node/blob/dev/CHANGELOG.md)
- [Commits](pattern-lab/patternlab-node@v5.16.2...v5.16.4)

---
updated-dependencies:
- dependency-name: "@pattern-lab/starterkit-handlebars-demo"
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

package-lock.json

@@ -65,7 +65,7 @@
     "@pattern-lab/cli": "^5.17.0",
     "@pattern-lab/core": "^5.17.0",
     "@pattern-lab/engine-handlebars": "^5.16.4",
-    "@pattern-lab/starterkit-handlebars-demo": "^5.16.2",
+    "@pattern-lab/starterkit-handlebars-demo": "^5.16.4",
     "@pattern-lab/uikit-workshop": "^5.17.0",
     "@wemake-services/stylelint-config-scss": "^1.0.0",
     "autoprefixer": "^10.4.12",