Update pytest.yml

.github/workflows/pytest.yml

@@ -5,6 +5,9 @@ on: [workflow_dispatch, push, pull_request]
 jobs:
   deploy:
     runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: ['^3.10']
 
     steps:
     - uses: actions/checkout@v2
@@ -12,7 +15,7 @@ jobs:
     - name: Set up Python
       uses: actions/setup-python@v2
       with:
-        python-version: '^3.10'
+        python-version: ${{ matrix.python-version }}
 
     - name: Install dependencies
       run: |