Bump nanoid from 5.0.2 to 5.0.4 in /backend

Bumps [nanoid](https://github.com/ai/nanoid) from 5.0.2 to 5.0.4.
- [Release notes](https://github.com/ai/nanoid/releases)
- [Changelog](https://github.com/ai/nanoid/blob/main/CHANGELOG.md)
- [Commits](ai/nanoid@5.0.2...5.0.4)

---
updated-dependencies:
- dependency-name: nanoid
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

backend/package.json

@@ -55,7 +55,7 @@
     "morgan": "^1.10.0",
     "multer": "^1.4.5-lts.1",
     "multer-s3": "^3.0.1",
-    "nanoid": "^5.0.2",
+    "nanoid": "^5.0.4",
     "node-fetch": "^3.3.2",
     "nodemailer": "^6.9.8",
     "open": "^9.1.0",