Bump express from 5.1.0 to 5.2.1

Bumps [express](https://github.com/expressjs/express) from 5.1.0 to 5.2.1.
- [Release notes](https://github.com/expressjs/express/releases)
- [Changelog](https://github.com/expressjs/express/blob/master/History.md)
- [Commits](expressjs/express@v5.1.0...v5.2.1)

---
updated-dependencies:
- dependency-name: express
  dependency-version: 5.2.1
  dependency-type: direct:development
...

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

Author: dependabot[bot]

package-lock.json

@@ -39,7 +39,7 @@
     "@types/jsonwebtoken": "^9.0.9",
     "@types/node": "^22.14.1",
     "dotenv": "^16.5.0",
-    "express": "^5.1.0",
+    "express": "^5.2.1",
     "helmet": "^8.1.0",
     "jsonwebtoken": "^9.0.2",
     "prettier": "3.5.3",