Bump socket.io from 2.3.0 to 2.4.0 in /node-bb/install

Bumps [socket.io](https://github.com/socketio/socket.io) from 2.3.0 to 2.4.0.
- [Release notes](https://github.com/socketio/socket.io/releases)
- [Changelog](https://github.com/socketio/socket.io/blob/main/CHANGELOG.md)
- [Commits](socketio/socket.io@2.3.0...2.4.0)

---
updated-dependencies:
- dependency-name: socket.io
  dependency-type: direct:production
...

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

node-bb/install/package.json

@@ -127,7 +127,7 @@
     "serve-favicon": "^2.5.0",
     "sharp": "0.25.2",
     "sitemap": "^6.1.0",
-    "socket.io": "2.3.0",
+    "socket.io": "2.4.0",
     "socket.io-adapter-cluster": "^1.0.1",
     "socket.io-adapter-mongo": "^2.0.5",
     "socket.io-adapter-postgres": "^1.2.1",