Bump html-webpack-plugin from 5.5.1 to 5.6.0 in /job-dsl-plugin

Bumps [html-webpack-plugin](https://github.com/jantimon/html-webpack-plugin) from 5.5.1 to 5.6.0.
- [Release notes](https://github.com/jantimon/html-webpack-plugin/releases)
- [Changelog](https://github.com/jantimon/html-webpack-plugin/blob/main/CHANGELOG.md)
- [Commits](jantimon/html-webpack-plugin@v5.5.1...v5.6.0)

---
updated-dependencies:
- dependency-name: html-webpack-plugin
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

job-dsl-plugin/package.json

@@ -35,7 +35,7 @@
     "eslint": "8.42.0",
     "handlebars": "4.7.7",
     "handlebars-loader": "1.7.3",
-    "html-webpack-plugin": "5.5.1",
+    "html-webpack-plugin": "5.6.0",
     "less": "4.1.3",
     "less-loader": "11.1.2",
     "mini-css-extract-plugin": "2.7.6",