Bump ws from 8.18.0 to 8.21.0 in /JavascriptServer

Bumps [ws](https://github.com/websockets/ws) from 8.18.0 to 8.21.0.
- [Release notes](https://github.com/websockets/ws/releases)
- [Commits](websockets/ws@8.18.0...8.21.0)

---
updated-dependencies:
- dependency-name: ws
  dependency-version: 8.21.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]

JavascriptServer/package-lock.json

@@ -25,7 +25,7 @@
         "minimist": "^1.2.8",
         "mongoose": "^8.9.5",
         "semver": "^7.5.2",
-        "ws": "^8.17.1"
+        "ws": "^8.21.0"
     },
     "devDependencies": {
         "@types/node": "^18.15.11",