Bump webpack-cli from 5.1.4 to 6.0.0 in /{{cookiecutter.project_slug}}

Bumps [webpack-cli](https://github.com/webpack/webpack-cli) from 5.1.4 to 6.0.0.
- [Release notes](https://github.com/webpack/webpack-cli/releases)
- [Changelog](https://github.com/webpack/webpack-cli/blob/master/CHANGELOG.md)
- [Commits](https://github.com/webpack/webpack-cli/compare/webpack-cli@5.1.4...webpack-cli@6.0.0)

---
updated-dependencies:
- dependency-name: webpack-cli
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

{{cookiecutter.project_slug}}/package.json

@@ -30,7 +30,7 @@
     "sass-loader": "^16.0.1",
     "webpack": "^5.65.0",
     "webpack-bundle-tracker": "^3.0.1",
-    "webpack-cli": "^5.0.1",
+    "webpack-cli": "^6.0.0",
     "webpack-dev-server": "^5.0.2",
     "webpack-merge": "^6.0.1"
   },