update workflow

Author: wdpypere

Diff for: .github/workflows/unittest.yml

@@ -6,9 +6,9 @@ jobs:
     runs-on: ubuntu-20.04
     steps:
     - name: Checkout code
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
     - name: Setup Python
-      uses: actions/setup-python@v4
+      uses: actions/setup-python@v5
       with:
         python-version: ${{ matrix.python }}
     - name: install tox