chore(deps): update dependency happy-dom to v20

Author: renovate[bot]

spring-boot-admin-server-ui/package-lock.json

@@ -95,7 +95,7 @@
     "eslint-plugin-storybook": "9.1.10",
     "eslint-plugin-vue": "^10.0.0",
     "globals": "^16.3.0",
-    "happy-dom": "^18.0.0",
+    "happy-dom": "^20.0.0",
     "jsdom": "^27.0.0",
     "msw": "2.11.3",
     "msw-storybook-addon": "2.0.5",