upgrade actions/setup-python and python version

Author: deniak

.github/workflows/test.yml

@@ -14,9 +14,9 @@ jobs:
         with:
           repository: w3c/linkchecker-testsuite
           path: test-suite
-      - uses: actions/setup-python@v4
+      - uses: actions/setup-python@v5
         with:
-          python-version: '3.7'
+          python-version: '3.11'
       - name: Install test suite dependencies
         working-directory: test-suite/harness
         run: |
@@ -42,4 +42,4 @@ jobs:
         run: sudo apt-get install -y bubblewrap
       - name: run test suite
         working-directory: test-suite/harness
-        run: bwrap --dev-bind / / --ro-bind ../hosts /etc/hosts sh -c "python linktest.py --checker_path ../../link-checker/bin/checklink run"
+        run: bwrap --dev-bind / / --ro-bind ../hosts /etc/hosts sh -c "python linktest.py --checker_path ../../link-checker/bin/checklink run"