chore(deps): bump express from 4.19.1 to 4.19.2 in /backend (#467)

Bumps [express](https://github.com/expressjs/express) from 4.19.1 to 4.19.2.
- [Release notes](https://github.com/expressjs/express/releases)
- [Changelog](https://github.com/expressjs/express/blob/master/History.md)
- [Commits](expressjs/express@4.19.1...4.19.2)

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

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Jessica Feng <54833118+JessicaF@users.noreply.github.com>

Author: dependabot[bot]

backend/package-lock.json

@@ -25,7 +25,7 @@
     "cors": "^2.8.5",
     "date-fns": "^2.30.0",
     "date-fns-tz": "^2.0.0",
-    "express": "^4.18.1",
+    "express": "^4.19.2",
     "graphql": "^16.6.0",
     "graphql-request": "^6.1.0"
   },