chore(deps): bump websockets from 13.1 to 15.0

Bumps [websockets](https://github.com/python-websockets/websockets) from 13.1 to 15.0.
- [Release notes](https://github.com/python-websockets/websockets/releases)
- [Commits](python-websockets/websockets@13.1...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>

Author: dependabot[bot]

requirements.txt

@@ -58,7 +58,7 @@ tzdata==2025.1
 uvicorn==0.34.0
 uvloop==0.21.0
 watchfiles==1.0.4
-websockets==13.1
+websockets==15.0
 yarl==1.18.3
 zope.event==5.0
 zope.interface==7.2