build(deps): bump websockets from 14.2 to 15.0

Bumps [websockets](/~https://github.com/python-websockets/websockets) from 14.2 to 15.0.
- [Release notes](/~https://github.com/python-websockets/websockets/releases)
- [Commits](python-websockets/websockets@14.2...15.0)

---
updated-dependencies:
- dependency-name: websockets
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

requirements.txt

@@ -116,7 +116,7 @@ urllib3==2.3.0
 webencodings==0.5.1
 WebOb==1.8.9
 websocket-client==1.8.0
-websockets==14.2
+websockets==15.0
 Werkzeug==3.1.3
 wrapt==1.17.2
 wsproto==1.2.0