chore(deps): bump express from 4.18.2 to 4.19.2 in /client/functions

Bumps [express](https://github.com/expressjs/express) from 4.18.2 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@4.18.2...4.19.2)

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

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

client/functions/package.json

@@ -19,7 +19,7 @@
     "@types/express": "^4.17.13",
     "axios": "^1.6.5",
     "cors": "^2.8.5",
-    "express": "^4.17.2",
+    "express": "^4.19.2",
     "express-jwt": "^8.4.1",
     "express-unless": "^2.1.3",
     "firebase-admin": "^12.0.0",