Update pytest.yml

Author: meenakshidembi691

.github/workflows/pytest.yml

@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest  
     strategy:  
       matrix:  
-        python-version: ["3.10"]  
+        python-version: ['3.9', '3.10', '3.11']  
 
     steps:  
       - uses: actions/checkout@v3