chore(deps): bump actix-ws from 0.3.0 to 0.3.1 in /examples (#689)

Bumps [actix-ws](https://github.com/actix/actix-extras) from 0.3.0 to 0.3.1.
- [Release notes](https://github.com/actix/actix-extras/releases)
- [Commits](actix/actix-extras@ws-v0.3.0...ws-v0.3.1)

---
updated-dependencies:
- dependency-name: actix-ws
  dependency-version: 0.3.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]