Update dependency sphinx to v9

renovate[bot] · web-flow · commit ac839355f83e · 2025-12-15T05:45:53.000Z
diff --git a/pyproject.toml b/pyproject.toml
@@ -17,7 +17,7 @@ pre-commit = "^4.5.0"
 [tool.poetry.group.docs.dependencies]
 furo = "^2025.9.25"
 recommonmark = "^0.7.1"
-sphinx = "^8.2.3"
+sphinx = "^9.0.4"
 sphinx-copybutton = "^0.5.2"
 sphinx-design = "^0.6.1"
 sphinxcontrib-apidoc = "^0.6.0"
