fix(deps): update dependency firebase-functions to v4

Author: renovate[bot]

.functions/package-lock.json

@@ -9,7 +9,7 @@
   "dependencies": {
     "@ecomplus/storefront-renderer": "^2.10.2",
     "firebase-admin": "^11.4.0",
-    "firebase-functions": "^3.24.1"
+    "firebase-functions": "^4.2.1"
   },
   "scripts": {
     "test": "echo \"Error: no test specified\" && exit 1"