Bump ws from 7.2.5 to 7.4.6 in /src/jupyterlab_robotmode

Bumps [ws](https://github.com/websockets/ws) from 7.2.5 to 7.4.6.
- [Release notes](https://github.com/websockets/ws/releases)
- [Commits](websockets/ws@7.2.5...7.4.6)

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

Author: dependabot[bot]