Bump firebase from 12.0.0 to 12.12.1 in /frontend

Bumps [firebase](https://github.com/firebase/firebase-js-sdk) from 12.0.0 to 12.12.1.
- [Release notes](https://github.com/firebase/firebase-js-sdk/releases)
- [Changelog](https://github.com/firebase/firebase-js-sdk/blob/main/CHANGELOG.md)
- [Commits](https://github.com/firebase/firebase-js-sdk/compare/firebase@12.0.0...v12.12.1)

---
updated-dependencies:
- dependency-name: firebase
  dependency-version: 12.12.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

frontend/package.json

@@ -49,7 +49,7 @@
     "date-fns": "^4.1.0",
     "embla-carousel-react": "^8.5.1",
     "ethers": "^6.15.0",
-    "firebase": "^12.0.0",
+    "firebase": "^12.12.1",
     "geist": "^1.4.0",
     "input-otp": "^1.4.1",
     "lucide-react": "^0.454.0",