build(deps-dev): bump happy-dom from 19.0.2 to 20.0.4 in /frontend

Bumps [happy-dom](https://github.com/capricorn86/happy-dom) from 19.0.2 to 20.0.4.
- [Release notes](https://github.com/capricorn86/happy-dom/releases)
- [Commits](capricorn86/happy-dom@v19.0.2...v20.0.4)

---
updated-dependencies:
- dependency-name: happy-dom
  dependency-version: 20.0.4
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

frontend/package-lock.json

@@ -63,7 +63,7 @@
     "autoprefixer": "^10.4.21",
     "browserslist-to-esbuild": "^2.1.1",
     "graphql": "^16.11.0",
-    "happy-dom": "^19.0.2",
+    "happy-dom": "^20.0.4",
     "i18next-parser": "^9.3.0",
     "knip": "^5.64.2",
     "msw": "^2.11.3",