Bump express from 4.21.2 to 5.1.0 in /selenium

Bumps [express](https://github.com/expressjs/express) from 4.21.2 to 5.1.0.
- [Release notes](https://github.com/expressjs/express/releases)
- [Changelog](https://github.com/expressjs/express/blob/master/History.md)
- [Commits](expressjs/express@4.21.2...v5.1.0)

---
updated-dependencies:
- dependency-name: express
  dependency-version: 5.1.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

selenium/package.json

@@ -14,7 +14,7 @@
   "dependencies": {
     "chromedriver": "^134.0",
     "ejs": "^3.1.8",
-    "express": "^4.18.2",
+    "express": "^5.1.0",
     "geckodriver": "^3.0.2",
     "http-proxy": "^1.18.1",
     "mqtt": "^5.3.3",