chore(deps-dev): Bump furo from 2023.9.10 to 2025.12.19

Bumps [furo](https://github.com/pradyunsg/furo) from 2023.9.10 to 2025.12.19.
- [Release notes](https://github.com/pradyunsg/furo/releases)
- [Changelog](https://github.com/pradyunsg/furo/blob/main/docs/changelog.md)
- [Commits](pradyunsg/furo@2023.09.10...2025.12.19)

---
updated-dependencies:
- dependency-name: furo
  dependency-version: 2025.12.19
  dependency-type: direct:development
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

poetry.lock

@@ -49,7 +49,7 @@ towncrier = ">=22.12.0"
 
 [tool.poetry.group.doc.dependencies]
 sphinx = "^7.1"
-furo = "^2023.9.10"
+furo = "^2025.12.19"
 
 [tool.ruff]
 fix = true