Bump happy-dom from 20.6.1 to 20.8.4 (#3379)

Bumps [happy-dom](https://github.com/capricorn86/happy-dom) from 20.6.1 to 20.8.4.
- [Release notes](https://github.com/capricorn86/happy-dom/releases)
- [Commits](capricorn86/happy-dom@v20.6.1...v20.8.4)

---
updated-dependencies:
- dependency-name: happy-dom
  dependency-version: 20.8.4
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

packages/react/package.json

@@ -39,7 +39,7 @@
     "@types/react": "^19.2.14",
     "@vitejs/plugin-react": "^5.1.4",
     "@vitest/ui": "^4.0.18",
-    "happy-dom": "^20.6.1",
+    "happy-dom": "^20.8.4",
     "react": "^19.2.4",
     "react-dom": "^19.2.4",
     "typescript": "^5.9.3",