Revert "build on Python 3.12 instead of Python 3.11 (#885)" (#904)

This reverts commit 80b01d298f.

.github/workflows/package-linux.yml

@@ -29,7 +29,7 @@ jobs:
     - name: Set up Python
       uses: actions/setup-python@v5
       with:
-        python-version: 3.12
+        python-version: 3.11
         cache: 'pip'
     - name: Install python dependencies
       run: |