update python versions

Author: jensdebruijn

.github/workflows/docs.yml

@@ -19,7 +19,7 @@ jobs:
       - name: Install Python
         uses: actions/setup-python@v2
         with:
-          python-version: 3.9
+          python-version: 3.12
       # https://docs.github.com/en/actions/guides/building-and-testing-python#caching-dependencies
       # ^-- How to set up caching for pip on Ubuntu
       - name: Cache pip

.github/workflows/pytest.yml

@@ -14,7 +14,7 @@ jobs:
     - name: Set up Python
       uses: actions/setup-python@v2
       with:
-        python-version: 3.11
+        python-version: 3.12
     - name: Install dependencies
       run: |
         sudo apt-add-repository ppa:ubuntugis/ubuntugis-unstable