Update test.yaml

Author: sandrajsalomone

.github/workflows/test.yaml

@@ -10,7 +10,7 @@ jobs:
     - name: Set up Python
       uses: actions/setup-python@v2
       with:
-        python-version: '3.7.x'
+        python-version: '3.9'
         architecture: 'x64'
     - name: Cache pip
       uses: actions/cache@v4