Bump furo from 2025.7.19 to 2025.9.25 (#225)

Author: dependabot[bot]

pyproject.toml

@@ -31,7 +31,7 @@ dependencies = [
 [dependency-groups]
 docs = [
     "Sphinx==8.2.0",
-    "furo==2025.7.19",
+    "furo==2025.9.25",
     "sphinx_mdinclude==0.6.0",
 ]
 dev = [