Update for websockets=15

[azjps]

The websockets version requirements were updated in PrefectHQ/prefect@79cb8b5 prefect==3.2.8, need to change the pinning of websockets here too (currently prefect conda can error for websockets==11 for example)

Closes #382

Checklist

• Used a personal fork of the feedstock to propose changes
• Bumped the build number (if the version is unchanged)
• Reset the build number to 0 (if the version changed)
• Re-rendered with the latest conda-smithy (Use the phrase @conda-forge-admin, please rerender in a comment in this PR for automated rerendering)
• Ensured the license file is being packaged.

[conda-forge-admin]

Hi! This is the friendly automated conda-forge-linting service.

I just wanted to let you know that I linted all conda-recipes in your PR (recipe/meta.yaml) and found it was in an excellent condition.

I do have some suggestions for making it better though...

For recipe/meta.yaml:

• ℹ️ top-level output has some malformed specs:

• In section run: aiosqlite >=0.17.0, <1.0.0, alembic >=1.7.5, <2.0.0, anyio >=4.4.0, <5.0.0, apprise >=1.1.0, <2.0.0, asgi-lifespan >=1.0, <3.0, asyncpg >=0.23, <1.0.0, cachetools >=5.3, <6.0, click >=8.0, <8.2, cloudpickle >=2.0, <4.0, coolname >=1.0.4, <3.0.0, croniter >=1.0.12, <5.0.0, dateparser >=1.1.1, <2.0.0, docker-py >=4.0, <8.0, fastapi >=0.111.0, <1.0.0, griffe >=0.49.0, <2.0.0, httpcore >=1.0.5, <2.0.0, httpx >=0.23, !=0.23.2, humanize >=4.9.0, <5.0.0, jinja2 >=3.0.0, <4.0.0, jsonpatch >=1.32, <2.0, jsonschema >=4.0.0, <5.0.0, opentelemetry-api >=1.27.0, <2.0, orjson >=3.7, <4.0, packaging >=21.3, <24.3, pendulum >=3.0.0, <4, pydantic >=2.7, <3.0.0, pydantic-core >=2.12.0, <3.0.0, pydantic-extra-types >=2.8.2, <3.0.0, python-slugify >=5.0, <9.0, python-dateutil >=2.8.2, <3.0.0, python-socks[asyncio] >=2.5.3, <3.0, pytz >=2021.1, <2025, pyyaml >=5.4.1, <7.0.0, readchar >=4.0.0, <5.0.0, rfc3339-validator >=0.1.4, <0.2.0, rich >=11.0, <14.0, sniffio >=1.3.0, <2.0.0, sqlalchemy[asyncio] >=2.0, <3.0.0, typer >=0.12.0,!= 0.12.2, <0.13.0, typing_extensions >=4.5.0, <5.0.0, ujson >=5.8.0, <6.0.0, websockets >=13.0, <16.0
  Requirement spec fields should match the syntax name [version [build]]to avoid known issues in conda-build. For example, instead of name =version=build, use name version.* build. There should be no spaces between version operators and versions either: python >= 3.8 should be python >=3.8.

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