chore(deps): bump firebase-admin from 11.11.0 to 12.0.0 in /innkeeper

Bumps [firebase-admin](https://github.com/firebase/firebase-admin-node) from 11.11.0 to 12.0.0.
- [Release notes](https://github.com/firebase/firebase-admin-node/releases)
- [Commits](firebase/firebase-admin-node@v11.11.0...v12.0.0)

---
updated-dependencies:
- dependency-name: firebase-admin
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

innkeeper/package.json

@@ -12,7 +12,7 @@
   "license": "ISC",
   "dependencies": {
     "dotenv": "^16.3.1",
-    "firebase-admin": "^11.11.0",
+    "firebase-admin": "^12.0.0",
     "socket.io": "^4.7.2",
     "y-socket.io": "^1.1.3",
     "yjs": "^13.6.8"