fix(deps): update dependency firebase-functions to v7

Author: renovate[bot]

examples/firebase/functions/package.json

@@ -13,7 +13,7 @@
   },
   "dependencies": {
     "firebase-admin": "^13.0.0",
-    "firebase-functions": "^6.0.0",
+    "firebase-functions": "^7.0.0",
     "graphql": "16.12.0",
     "graphql-yoga": "5.3.1"
   },