Update actions/setup-python (#23)

Author: fabaff

.github/workflows/python.yml

@@ -18,7 +18,7 @@ jobs:
     - uses: actions/checkout@v4
 
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@v5.3.0
       with:
         python-version: ${{ matrix.python-version }}