use py3.12 for docs

Author: FynnBe

.github/workflows/build.yaml

@@ -239,7 +239,7 @@ jobs:
           path: dist
       - uses: actions/setup-python@v5
         with:
-          python-version: '3.13'
+          python-version: '3.12'
           cache: 'pip'
       - run: pip install -e .[dev]
       - name: Generate developer docs