build(deps): bump express from 4.19.2 to 4.20.0

Bumps [express](https://github.com/expressjs/express) from 4.19.2 to 4.20.0.
- [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/4.19.2...4.20.0)

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

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

backend/package.json

@@ -42,7 +42,7 @@
     "dotenv": "^4.0.0",
     "emoji-regex": "^8.0.0",
     "escape-string-regexp": "^1.0.5",
-    "express": "^4.19.2",
+    "express": "^4.20.0",
     "fp-ts": "^2.0.1",
     "humanize-duration": "^3.15.0",
     "js-yaml": "^3.13.1",