Test on Python >= 3.9

No effects were observed on Make-managed files.

References:
* casework/CASE-Utilities-Python#127

Signed-off-by: Alex Nelson <[email protected]>

Author: ajnelson-nist

.github/workflows/supply-chain.yml

@@ -25,7 +25,7 @@ jobs:
     strategy:
       matrix:
         python-version:
-          - '3.8'
+          - '3.9'
           - '3.11'
 
     steps: