chore(deps-dev): Bump furo from 2024.8.6 to 2025.9.25

Bumps [furo](https://github.com/pradyunsg/furo) from 2024.8.6 to 2025.9.25.
- [Release notes](https://github.com/pradyunsg/furo/releases)
- [Changelog](https://github.com/pradyunsg/furo/blob/main/docs/changelog.md)
- [Commits](pradyunsg/furo@2024.08.06...2025.09.25)

---
updated-dependencies:
- dependency-name: furo
  dependency-version: 2025.9.25
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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Author: dependabot[bot]