update github action to use Python 3.13

Author: wim-vdw

.github/workflows/python_build.yml

@@ -10,10 +10,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - name: Setup Python 3.11
+      - name: Setup Python 3.13
         uses: actions/setup-python@v5
         with:
-          python-version: 3.11
+          python-version: 3.13
       - name: Install dependencies
         run: make install
       - name: Install development dependencies (Pytest and Coverage)