Update deploy-pure-python.yml

Author: BalzaniEdoardo

.github/workflows/deploy-pure-python.yml

@@ -17,7 +17,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v4
         with:
-          python-version: '3.x'
+          python-version: '3.12'
       - name: Build package
         run: |
           pip install build