Update python-app.yml

Author: sid86-dev

.github/workflows/python-app.yml

@@ -16,7 +16,7 @@ jobs:
     strategy:
       matrix:
         # Run in all these versions of Python
-        python-version: [3.7, 3.9]
+        python-version: [3.7]
 
     steps:
         # Checkout the latest code from the repo