Bump actions/setup-python to v4

Author: stevepiercy

.github/workflows/test.yml

@@ -9,7 +9,7 @@ jobs:
       - uses: actions/checkout@v1
 
       - name: Set up Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v4
         with:
           python-version: "3.10"