Merge pull request #470 from python-jsonschema/dependabot/pip/sphinx-lt-9

Update sphinx requirement from <8 to <9

Author: sirosen

setup.cfg

@@ -45,7 +45,7 @@ dev =
     pytest-xdist<4
     responses==0.25.3
 docs =
-    sphinx<8
+    sphinx<9
     sphinx-issues<5
     furo==2024.5.6