Fix Python version for publish CI

Author: gmazoyer

.github/workflows/publish.yml

@@ -16,7 +16,7 @@ jobs:
     - name: Set up Python
       uses: actions/setup-python@v5
       with:
-        python-version: "3.8"
+        python-version: "3.9"
 
     - name: Install Poetry
       run: pipx install poetry