chore(deps): bump socket.io from 2.4.1 to 4.4.1 in /images/socketio

Bumps [socket.io](https://github.com/socketio/socket.io) from 2.4.1 to 4.4.1.
- [Release notes](https://github.com/socketio/socket.io/releases)
- [Changelog](https://github.com/socketio/socket.io/blob/master/CHANGELOG.md)
- [Commits](https://github.com/socketio/socket.io/compare/2.4.1...4.4.1)

---
updated-dependencies:
- dependency-name: socket.io
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

images/socketio/package.json

@@ -7,7 +7,7 @@
   "dependencies": {
     "express": "^4.17.1",
     "redis": "^3.1.1",
-    "socket.io": "^2.4.0",
+    "socket.io": "^4.4.1",
     "superagent": "^5.1.0"
   }
 }