Add .readthedocs.yml, align python version in ci to build docs

.github/workflows/ci.yml

@@ -66,13 +66,13 @@ jobs:
           python -m pip install -r requirements/common.pip
       - run: coverage run --source=django_tables2 manage.py test
 
-  build_docs:
+  docs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
       - uses: actions/setup-python@v4.5.0
         with:
-            python-version: 3.9
+            python-version: "3.11"
             cache: 'pip'
             cache-dependency-path: |
               docs/requirements.txt

.readthedocs.yml

@@ -0,0 +1,21 @@
+# .readthedocs.yaml
+# Read the Docs configuration file
+# See https://docs.readthedocs.io/en/stable/config-file/v2.html for details
+
+# Required
+version: 2
+
+# Set the version of Python and other tools you might need
+build:
+  os: ubuntu-22.04
+  tools:
+    python: "3.11"
+
+# Build documentation in the docs/ directory with Sphinx
+sphinx:
+   configuration: docs/conf.py
+
+# Optionally declare the Python requirements required to build your docs
+python:
+   install:
+   - requirements: docs/requirements.txt