CI: GitHub: add builds on 3.11

...and also switch various jobs to use that by default.

Change-Id: I9170fc305bfd9bea6b5dde5741f912c6ed455e3e

.github/workflows/main.yml

@@ -28,7 +28,8 @@ jobs:
         tox_env:
           - py38
           - py39
-          - py310-cover
+          - py310
+          - py311-cover
         include:
           - tox_env: docs
             dnf_install: graphviz
@@ -45,7 +46,7 @@ jobs:
       - uses: actions/setup-python@v4
         name: Install Python
         with:
-          python-version: '3.10'
+          python-version: '3.11'
       - uses: casperdcl/deploy-pypi@bb869aafd89f657ceaafe9561d3b5584766c0f95
         with:
           password: ${{ secrets.PYPI_API_TOKEN }}
@@ -113,5 +114,7 @@ jobs:
         include:
           - os: windows-2019
             python_version: "3.10"
+          - os: windows-2022
+            python_version: "3.11"
           - os: macos-12
-            python_version: "3.10"
+            python_version: "3.11"