Undo update of Python version in publish.yml

Author: AdamRJensen

.github/workflows/publish.yml

@@ -22,7 +22,7 @@ jobs:
     - name: Set up Python
       uses: actions/setup-python@v5
       with:
-        python-version: "3.12"
+        python-version: "3.9"
 
     - name: Install build tools
       run: |