build(deps): bump furo from 2024.8.6 to 2025.7.19 in /docs

---
updated-dependencies:
- dependency-name: furo
  dependency-version: 2025.7.19
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

docs/requirements.txt

@@ -1,3 +1,3 @@
-furo==2024.8.6
+furo==2025.7.19
 sphinx==8.2.3
 myst_parser==4.0.1