chore(deps): update dependency sphinx to v9

Author: renovate[bot]

pyproject.toml

@@ -34,7 +34,7 @@ dev-dependencies = [
   "pytest",
   "pytest-mock",
   "responses",
-  "sphinx~=5.3.0",
+  "sphinx~=9.1.0",
   "sphinx-autobuild",
   "sphinx-argparse",
   "sphinx-book-theme",