chore(deps-dev): bump happy-dom from 18.0.1 to 20.8.9

Bumps [happy-dom](https://github.com/capricorn86/happy-dom) from 18.0.1 to 20.8.9.
- [Release notes](https://github.com/capricorn86/happy-dom/releases)
- [Commits](capricorn86/happy-dom@v18.0.1...v20.8.9)

---
updated-dependencies:
- dependency-name: happy-dom
  dependency-version: 20.8.9
  dependency-type: direct:development
...

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

Author: dependabot[bot]

package.json

@@ -89,7 +89,7 @@
     "eslint-config-prettier": "^10.0.1",
     "genversion": "^3.2.0",
     "globals": "^16.0.0",
-    "happy-dom": "^18.0.0",
+    "happy-dom": "^20.8.9",
     "prettier": "^3.4.2",
     "release-it": "^19.0.0",
     "rollup-plugin-preserve-directives": "^0.4.0",