Bump ws and @types/ws in /backend

Bumps [ws](https://github.com/websockets/ws) and [@types/ws](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/ws). These dependencies needed to be updated together.

Updates `ws` from 8.13.0 to 8.16.0
- [Release notes](https://github.com/websockets/ws/releases)
- [Commits](https://github.com/websockets/ws/compare/8.13.0...8.16.0)

Updates `@types/ws` from 8.5.5 to 8.5.10
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/ws)

---
updated-dependencies:
- dependency-name: ws
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: "@types/ws"
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

backend/package.json

@@ -52,7 +52,7 @@
     "redis": "^4.6.6",
     "socks-proxy-agent": "~7.0.0",
     "typescript": "~4.9.3",
-    "ws": "~8.13.0"
+    "ws": "~8.16.0"
   },
   "devDependencies": {
     "@babel/code-frame": "^7.18.6",
@@ -61,7 +61,7 @@
     "@types/crypto-js": "^4.1.1",
     "@types/express": "^4.17.17",
     "@types/jest": "^29.5.0",
-    "@types/ws": "~8.5.5",
+    "@types/ws": "~8.5.10",
     "@typescript-eslint/eslint-plugin": "^5.55.0",
     "@typescript-eslint/parser": "^5.55.0",
     "eslint": "^8.36.0",