Bump express from 4.19.2 to 4.21.0

Bumps [express](https://github.com/expressjs/express) from 4.19.2 to 4.21.0.
- [Release notes](https://github.com/expressjs/express/releases)
- [Changelog](https://github.com/expressjs/express/blob/4.21.0/History.md)
- [Commits](https://github.com/expressjs/express/compare/4.19.2...4.21.0)

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

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

package.json

@@ -20,7 +20,7 @@
   "dependencies": {
     "bcrypt": "^5.1.1",
     "cors": "^2.8.5",
-    "express": "^4.19.2",
+    "express": "^4.21.0",
     "joi": "^17.13.3",
     "mongoose": "^8.6.2",
     "nodemailer": "^6.9.15",