Upgrade workflow actions.

Author: stefanholek

.github/workflows/python-package.yml

@@ -28,12 +28,12 @@ jobs:
 
     steps:
       - name: Check out project
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
         with:
           persist-credentials: false
 
       - name: Set up Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v6
+        uses: actions/setup-python@v7
         with:
           python-version: ${{ matrix.python-version }}
           cache: pip