chore(deps-dev): bump html-webpack-plugin in /services/idp

Bumps [html-webpack-plugin](https://github.com/jantimon/html-webpack-plugin) from 5.6.3 to 5.6.4.
- [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@v5.6.3...v5.6.4)

---
updated-dependencies:
- dependency-name: html-webpack-plugin
  dependency-version: 5.6.4
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

services/idp/package.json

@@ -144,7 +144,7 @@
     "eslint-plugin-testing-library": "^5.11.1",
     "eslint-webpack-plugin": "^4.2.0",
     "file-loader": "6.2.0",
-    "html-webpack-plugin": "5.6.3",
+    "html-webpack-plugin": "5.6.4",
     "i18next-conv": "^15.1.1",
     "i18next-parser": "^9.3.0",
     "jest": "29.7.0",