fix(deps): update dependency firebase-admin to v12 (#2110)

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

Author: renovate[bot]

examples/google-cloud-functions/package.json

@@ -16,7 +16,7 @@
   "dependencies": {
     "@envelop/core": "*",
     "@graphql-tools/schema": "10.0.2",
-    "firebase-admin": "11.11.0",
+    "firebase-admin": "12.0.0",
     "firebase-functions": "4.5.0",
     "graphql": "16.8.1",
     "graphql-helix": "1.13.0"