ci: pin GitHub Actions release workflow to Python3.12

Author: mehmetcanay

.github/workflows/python-publish.yaml

@@ -25,7 +25,7 @@ jobs:
     - name: Set up Python
       uses: actions/setup-python@v5
       with:
-        python-version: '3.x'
+        python-version: '3.12'
 
     - name: Install Poetry
       run: |