use python 3.12 @ build python distribution job

Author: ev-br

.github/workflows/publish-package.yml

@@ -37,7 +37,7 @@ jobs:
     - name: Set up Python
       uses: actions/setup-python@v6
       with:
-        python-version: '3.x'
+        python-version: '3.12'
 
     - name: Install python-build and twine
       run: |