avoid Python 3.12 for pdoc workflow

Author: slayoo

.github/workflows/pdoc.yml

@@ -14,6 +14,8 @@ jobs:
         with:
           persist-credentials: false
       - uses: actions/setup-python@v2
+        with:
+          python-version: "3.11"
       - name: Build
         run: |
           pip install pdoc3