Bump ws from 7.4.6 to 7.5.10 in /test/load (#3787)

Bumps [ws](https://github.com/websockets/ws) from 7.4.6 to 7.5.10.
- [Release notes](https://github.com/websockets/ws/releases)
- [Commits](https://github.com/websockets/ws/compare/7.4.6...7.5.10)

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

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test/load/package.json

@@ -10,6 +10,6 @@
   "license": "ISC",
   "dependencies": {
     "artillery": "^2.0.10",
-    "ws": "^7.4.6"
+    "ws": "^7.5.10"
   }
 }