chore(deps): bump @types/node in /tools/integration-test

Bumps [@types/node](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/node) from 20.8.2 to 20.8.4.
- [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-type: direct:development
  update-type: version-update:semver-patch
...

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

tools/integration-test/package.json

@@ -19,7 +19,7 @@
     "@guardian/eslint-config-typescript": "7.0.0",
     "@guardian/tsconfig": "^0.2.0",
     "@types/jest": "^29.1.2",
-    "@types/node": "20.8.2",
+    "@types/node": "20.8.4",
     "aws-cdk": "2.100.0",
     "aws-cdk-lib": "2.100.0",
     "constructs": "10.3.0",