Bump distributed from 2025.12.0 to 2026.1.0

Bumps [distributed](https://github.com/dask/distributed) from 2025.12.0 to 2026.1.0.
- [Release notes](https://github.com/dask/distributed/releases)
- [Changelog](https://github.com/dask/distributed/blob/main/docs/release-procedure.md)
- [Commits](dask/distributed@2025.12.0...2026.1.0)

---
updated-dependencies:
- dependency-name: distributed
  dependency-version: 2026.1.0
  dependency-type: direct:production
...

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Author: dependabot[bot]