build(deps): bump ws in /modules/jooby-graphql-playground

Bumps  and [ws](https://github.com/websockets/ws). These dependencies needed to be updated together.

Updates `ws` from 7.5.9 to 8.18.2
- [Release notes](https://github.com/websockets/ws/releases)
- [Commits](websockets/ws@7.5.9...8.18.2)

Updates `ws` from 6.2.2 to 8.18.2
- [Release notes](https://github.com/websockets/ws/releases)
- [Commits](websockets/ws@7.5.9...8.18.2)

---
updated-dependencies:
- dependency-name: ws
  dependency-version: 8.18.2
  dependency-type: indirect
- dependency-name: ws
  dependency-version: 8.18.2
  dependency-type: indirect
...

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Author: dependabot[bot]