Ensure correct Python version is installed in GitHub Actions (#13)

Author: alkino

.github/workflows/test.yml

@@ -25,6 +25,8 @@ jobs:
       - uses: actions/checkout@v3
       - name: Setup Python ${{ matrix.python }}
         uses: actions/setup-python@v4
+        with:
+          python-version: ${{ matrix.python }}
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip