Bump latter tested Python version to 3.13

No effects were observed on Make-managed files.

References:
* #173

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

Author: ajnelson-nist

.github/workflows/supply-chain.yml

@@ -29,7 +29,7 @@ jobs:
       matrix:
         python-version:
           - '3.9'
-          - '3.12'
+          - '3.13'
 
     steps:
     - uses: actions/checkout@v4