build(deps-dev): bump happy-dom in /backend/cmd/auth/web/ts

Bumps [happy-dom](https://github.com/capricorn86/happy-dom) from 20.0.2 to 20.8.9.
- [Release notes](https://github.com/capricorn86/happy-dom/releases)
- [Commits](capricorn86/happy-dom@v20.0.2...v20.8.9)

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

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

Author: dependabot[bot]

backend/cmd/auth/web/ts/package-lock.json

@@ -1,6 +1,6 @@
 {
   "devDependencies": {
-    "happy-dom": "^20.0.2",
+    "happy-dom": "^20.8.9",
     "ts-node": "^10.9.2",
     "typescript": "^5.7.2",
     "vitest": "^3.2.3"