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:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

docs/requirements-docs.txt

@@ -1,6 +1,6 @@
 chango~=0.4.0
 sphinx==8.2.3
-furo==2024.8.6
+furo==2025.9.25
 furo-sphinx-search @ git+https://github.com/harshil21/furo-sphinx-search@v0.2.0.1
 sphinx-paramlinks==0.6.0
 sphinxcontrib-mermaid==1.0.0