sandbox-npm(deps): bump @hapi/hapi from 21.4.0 to 21.4.2 in /sandbox

Bumps [@hapi/hapi](https://github.com/hapijs/hapi) from 21.4.0 to 21.4.2.
- [Release notes](https://github.com/hapijs/hapi/releases)
- [Commits](hapijs/hapi@v21.4.0...v21.4.2)

---
updated-dependencies:
- dependency-name: "@hapi/hapi"
  dependency-version: 21.4.2
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

sandbox/package-lock.json

@@ -12,7 +12,7 @@
   "homepage": "https://github.com/NHSDigital/hello-world-api",
   "main": "app.js",
   "dependencies": {
-    "@hapi/hapi": "^21.4.0",
+    "@hapi/hapi": "^21.4.3",
     "@hapi/inert": "^7.1.0",
     "lodash": "^4.17.20"
   },