build(deps): bump ws from 6.2.3 to 6.2.4 in /example

Bumps [ws](https://github.com/websockets/ws) from 6.2.3 to 6.2.4.
- [Release notes](https://github.com/websockets/ws/releases)
- [Commits](websockets/ws@6.2.3...6.2.4)

---
updated-dependencies:
- dependency-name: ws
  dependency-version: 6.2.4
  dependency-type: indirect
...

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

Author: dependabot[bot]