Upgrade workflow actions.

Author: stefanholek

.github/workflows/python-package.yml

@@ -27,12 +27,12 @@ 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 }}
 
@@ -45,7 +45,7 @@ jobs:
           echo py=$(python -c'import sys; print("%d.%d" % sys.version_info[:2])')
 
       - name: Cache pip
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           path: ${{ steps.pip-cache.outputs.dir }}
           key: ${{ runner.os }}-pip-py${{ steps.pip-cache.outputs.py }}-${{ hashFiles('setup.cfg') }}