Bump cookie, express and express-session in /example/oauth-backend

Bumps [cookie](https://github.com/jshttp/cookie) to 0.7.1 and updates ancestor dependencies [cookie](https://github.com/jshttp/cookie), [express](https://github.com/expressjs/express) and [express-session](https://github.com/expressjs/session). These dependencies need to be updated together.


Updates `cookie` from 0.6.0 to 0.7.1
- [Release notes](https://github.com/jshttp/cookie/releases)
- [Commits](jshttp/cookie@v0.6.0...v0.7.1)

Updates `express` from 4.21.0 to 4.21.1
- [Release notes](https://github.com/expressjs/express/releases)
- [Changelog](https://github.com/expressjs/express/blob/4.21.1/History.md)
- [Commits](expressjs/express@4.21.0...4.21.1)

Updates `express-session` from 1.17.3 to 1.18.1
- [Release notes](https://github.com/expressjs/session/releases)
- [Changelog](https://github.com/expressjs/session/blob/master/HISTORY.md)
- [Commits](expressjs/session@v1.17.3...v1.18.1)

---
updated-dependencies:
- dependency-name: cookie
  dependency-type: indirect
- dependency-name: express
  dependency-type: direct:production
- dependency-name: express-session
  dependency-type: direct:production
...

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

example/oauth-backend/package.json

@@ -10,7 +10,7 @@
     "node": ">=18"
   },
   "dependencies": {
-    "express": "^4.21.0",
-    "express-session": "^1.17.2"
+    "express": "^4.21.1",
+    "express-session": "^1.18.1"
   }
 }