Update GitHub action

Author: Cito

.github/workflows/page.yml

@@ -15,10 +15,10 @@ jobs:
         uses: actions/checkout@v4
         with:
           repository: "PyGreSQL/PyGreSQL"
-      - name: Set up Python 3.12
+      - name: Set up Python 3.13
         uses: actions/setup-python@v5
         with:
-          python-version: 3.12
+          python-version: 3.13
       - name: Install dependencies
         run: |
           sudo apt install libpq-dev