Bump graphql from 14.7.0 to 16.8.1 in /_examples/chat

Bumps [graphql](https://github.com/graphql/graphql-js) from 14.7.0 to 16.8.1.
- [Release notes](https://github.com/graphql/graphql-js/releases)
- [Commits](graphql/graphql-js@v14.7.0...v16.8.1)

---
updated-dependencies:
- dependency-name: graphql
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

_examples/chat/package.json

@@ -5,7 +5,7 @@
   "dependencies": {
     "@apollo/client": "^3.2.3",
     "apollo-utilities": "^1.0.26",
-    "graphql": "^14.0.2",
+    "graphql": "^16.8.1",
     "graphql-sse": "^2.0.0",
     "graphql-tag": "^2.10.0",
     "graphql-ws": "^5.8.1",