Update testing.yml

Author: tsubramanian

.github/workflows/testing.yml

@@ -38,7 +38,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest, macos-latest]
-        python-version: [3.7.17, 3.8, 3.9]
+        python-version: [3.8, 3.9]
 
     steps:
       # Checkout and env setup