fix: update dependency @google-cloud/firestore to v7.11.4 (#3059)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

backend/package-lock.json

@@ -31,7 +31,7 @@
     "typescript": "5.9.2"
   },
   "dependencies": {
-    "@google-cloud/firestore": "7.11.3",
+    "@google-cloud/firestore": "7.11.4",
     "@google-cloud/logging-winston": "6.0.1",
     "@google-cloud/secret-manager": "5.6.0",
     "@google-cloud/storage": "7.16.0",