Bump actions/setup-python to v5

Author: lurch

.github/workflows/test.yml

@@ -26,7 +26,7 @@ jobs:
     - name: Checkout code
       uses: actions/checkout@v1
     - name: Setup Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v2
+      uses: actions/setup-python@v5
       with:
         python-version: ${{ matrix.python-version }}
     - name: Update pip