Bump express from 4.17.1 to 4.17.3 in /frontend

Bumps [express](https://github.com/expressjs/express) from 4.17.1 to 4.17.3.
- [Release notes](https://github.com/expressjs/express/releases)
- [Changelog](https://github.com/expressjs/express/blob/master/History.md)
- [Commits](https://github.com/expressjs/express/compare/4.17.1...4.17.3)

---
updated-dependencies:
- dependency-name: express
  dependency-type: direct:development
...

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

frontend/package.json

@@ -45,7 +45,7 @@
     "domino": "^2.1.6",
     "dotenv": "^10.0.0",
     "eslint": "^7.31.0",
-    "express": "^4.17.1",
+    "express": "^4.17.3",
     "html-loader": "^2.1.2",
     "html-webpack-plugin": "^5.5.0",
     "js-yaml": "^4.1.0",