chore(deps-dev): update websocket-client requirement

Updates the requirements on [websocket-client](https://github.com/websocket-client/websocket-client) to permit the latest version.
- [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@v1.9.0...v1.9.1)

---
updated-dependencies:
- dependency-name: websocket-client
  dependency-version: 1.9.1
  dependency-type: direct:development
...

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

Author: dependabot[bot]

requirements/adapter_dev.txt

@@ -76,4 +76,4 @@ tornado>=6.5.6,<7; python_version >= "3.9"
 # websocket_client
 # Note: Socket Mode 3rd party implementation
 websocket_client>=1.2.3,<1.9; python_version < "3.9"
-websocket_client>=1.9.0,<2; python_version >= "3.9"
+websocket_client>=1.9.1,<2; python_version >= "3.9"