Update Python range to >= 3.10, per 3.9 EOL

No effects were observed on Make-managed files.

References:
* https://peps.python.org/pep-0596/

Signed-off-by: Alex Nelson <alexander.nelson@nist.gov>

Author: ajnelson-nist

.github/workflows/ci.yml

@@ -29,7 +29,7 @@ jobs:
     strategy:
       matrix:
         python-version:
-          - '3.9'
+          - '3.10'
           - '3.13'
 
     steps:

.github/workflows/supply-chain.yml

@@ -28,7 +28,7 @@ jobs:
     strategy:
       matrix:
         python-version:
-          - '3.9'
+          - '3.10'
           - '3.13'
 
     steps: