Some stubs do not yet exist for Python 3.11

Author: Cito

tox.ini

@@ -43,7 +43,7 @@ commands =
     mypy src tests
 
 [testenv:docs]
-basepython = python3.11
+basepython = python3.10
 deps =
     sphinx>=5.3,<6
     sphinx_rtd_theme>=1.1,<2