github: Install Python 3.11 for Windows CI runs.

projectgus · projectgus · commit f1363d85406d · 2026-01-22T13:12:58.000+11:00
As of January 12 the default Python version changed from 3.9 to 3.12, and 3.12 has issues running the settrace tests. 3.13 seems to also have some issues, so setting 3.11 for now. See actions/runner-images#13468 Signed-off-by: Angus Gratton <angus@redyak.com.au>
diff --git a/.github/workflows/ports_windows.yml b/.github/workflows/ports_windows.yml
@@ -45,6 +45,12 @@ jobs:
     env:
       CI_BUILD_CONFIGURATION: ${{ matrix.configuration }}
     steps:
+    - name: Install Python 3.11
+      # As of 20260112 the default Python version in Windows image is 3.12, which breaks settrace tests
+      # Use 3.11 for now
+      uses: actions/setup-python@v6
+      with:
+        python-version: '3.11'
     - name: Install Visual Studio ${{ matrix.visualstudio }}
       if: matrix.custom_vs_install
       shell: bash
