chore(deps-dev): bump @types/node in /edc-policy-playground

Bumps [@types/node](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/node) from 20.14.10 to 26.1.1.
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/node)

---
updated-dependencies:
- dependency-name: "@types/node"
  dependency-version: 26.1.1
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

edc-policy-playground/package-lock.json

@@ -38,7 +38,7 @@
     "@angular/cli": "~18.0.7",
     "@angular/compiler-cli": "^18.0.6",
     "@types/jasmine": "~5.1.4",
-    "@types/node": "^20.14.10",
+    "@types/node": "^26.1.1",
     "@typescript-eslint/eslint-plugin": "7.15.0",
     "@typescript-eslint/parser": "7.18.0",
     "eslint": "^8.55.0",