Bump Python version to 3.11

wxPython finally has a Python 3.11 wheel so we can bump the version. Hopefully 3.12 won't take as long

Author: Crozzers

.github/workflows/build-and-test.yml

@@ -46,7 +46,7 @@ jobs:
           ref: ${{ inputs.gitRef }}
       - uses: actions/setup-python@v4
         with:
-          python-version: "3.10"
+          python-version: "3.11"
       - name: Install Python dependencies
         run: |
           python -m pip install -r requirements-dev.txt