Bump ws from 8.18.1 to 8.21.0 in /packages/http-client-python

Bumps [ws](https://github.com/websockets/ws) from 8.18.1 to 8.21.0.
- [Release notes](https://github.com/websockets/ws/releases)
- [Commits](websockets/ws@8.18.1...8.21.0)

---
updated-dependencies:
- dependency-name: ws
  dependency-version: 8.20.1
  dependency-type: indirect
...

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