chore(deps-dev): bump @types/node from 25.9.1 to 26.4.0

Bumps [@types/node](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/node) from 25.9.1 to 26.4.0.
- [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: 26.4.0
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

package.json

@@ -33,7 +33,7 @@
         "@guardian/eslint-config": "16.0.0",
         "@guardian/prettier": "11.0.0",
         "@types/jest": "30.0.0",
-        "@types/node": "25.9.1",
+        "@types/node": "26.4.0",
         "concurrently": "10.0.3",
         "eslint": "9.39.2",
         "eslint-plugin-react": "7.37.5",