Update Examples (#430)

Author: theguild-bot

examples/extra-fields/package.json

@@ -6,7 +6,7 @@
     "graphql": "^16.9.0",
     "graphql-yoga": "^5.10.6",
     "tslib": "^2.8.1",
-    "@graphql-hive/gateway": "please replace me"
+    "@graphql-hive/gateway": "^1.7.8"
   },
   "devDependencies": {
     "tsx": "^4.19.2"