Bump websocket-client from 1.6.3 to 1.6.4 in /test

Bumps [websocket-client](https://github.com/websocket-client/websocket-client) from 1.6.3 to 1.6.4.
- [Release notes](https://github.com/websocket-client/websocket-client/releases)
- [Changelog](https://github.com/websocket-client/websocket-client/blob/master/ChangeLog)
- [Commits](websocket-client/websocket-client@v1.6.3...v1.6.4)

---
updated-dependencies:
- dependency-name: websocket-client
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

test/requirements.ci.txt

@@ -3,4 +3,4 @@ grpcio==1.59.0
 protobuf==4.24.4
 requests==2.31.0
 urllib3==2.0.6
-websocket-client==1.6.3
+websocket-client==1.6.4