fix(deps): update dependency sphinx to v9

Author: renovate[bot]

pyproject.toml

@@ -5,7 +5,7 @@ description = ""
 authors = [{ name = "Enalean team" }]
 requires-python = ">=3.13"
 dependencies = [
-    "Sphinx>=8.2.3,<9",
+    "Sphinx>=9.0.1,<10",
     "sphinx-rtd-theme>=3.0.2,<4",
     "sphinxext-rediraffe>=0.3,<0.4",
     "sphinx-notfound-page>=1.1.0,<2",