Update unit_testing_umfile_utils.yml

Author: leoberhelman

.github/workflows/ unit_testing_umfile_utils.yml

@@ -15,7 +15,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.9", "3.10", "3.11"]
+        python-version: ["3.10", "3.11"]
 
     steps:
       - name: Checkout source