Run github workflow tests on Python 3.11

Author: markqvist

.github/workflows/build.yml

@@ -43,7 +43,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v5
         with:
-          python-version: 3.x
+          python-version: 3.11
       - run: |
           python -m pip install -q build wheel setuptools
           make remove_symlinks