CI: use setup-python@v4

Author: Wenzel

.github/workflows/ci.yml

@@ -16,7 +16,7 @@ jobs:
       - uses: actions/checkout@v4
 
       - name: Set up Python 3.7 🐍
-        uses: actions/setup-python@v1
+        uses: actions/setup-python@v4
         with:
           python-version: '3.7'
 
@@ -41,7 +41,7 @@ jobs:
         uses: ./python-libvmi/.github/actions/libvmi-setup
 
       - name: Set up Python 🐍
-        uses: actions/setup-python@v1
+        uses: actions/setup-python@v4
         with:
           python-version: ${{ matrix.python }}