Bump ws and websocket-stream in /slides (#123)

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

Updates `ws` from 6.2.2 to 6.2.3
- [Release notes](https://github.com/websockets/ws/releases)
- [Commits](websockets/ws@6.2.2...6.2.3)

Updates `websocket-stream` from 5.1.2 to 5.3.0
- [Release notes](https://github.com/maxogden/websocket-stream/releases)
- [Commits](max-mapper/websocket-stream@v5.1.2...v5.3.0)

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

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Sanket Verma <svsanketverma5@gmail.com>

Author: dependabot[bot]