Build docs on 3.11 (#1101)

.github/workflows/ci.yml

@@ -144,7 +144,7 @@ jobs:
       - uses: actions/setup-python@v4
         with:
           # Keep in sync with tox/docs and .readthedocs.yaml.
-          python-version: "3.10"
+          python-version: "3.11"
 
       - run: python -Im pip install --upgrade wheel tox
       - run: python -Im tox -e docs,changelog

.readthedocs.yaml

@@ -6,7 +6,7 @@ build:
   os: ubuntu-20.04
   tools:
     # Keep version in sync with tox.ini/docs and ci.yml/docs.
-    python: "3.10"
+    python: "3.11"
 
 python:
   install:

tox.ini

@@ -5,7 +5,7 @@ isolated_build = True
 
 [testenv:docs]
 # Keep basepython in sync with ci.yml/docs and .readthedocs.yaml.
-basepython = python3.10
+basepython = python3.11
 extras = docs
 commands =
     sphinx-build -n -T -W -b html -d {envtmpdir}/doctrees docs docs/_build/html