Bump ws in /examples/graphql-example/apollo-server-example

Bumps [ws](https://github.com/websockets/ws) from 5.2.2 to 5.2.3.
- [Release notes](https://github.com/websockets/ws/releases)
- [Commits](websockets/ws@5.2.2...5.2.3)

---
updated-dependencies:
- dependency-name: ws
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]