test: python 3.12/3.13

Problem: We need to support newer versions of Python. These have been
disabled because I think the build will fail, but we need to test.

Signed-off-by: vsoch <vsoch@users.noreply.github.com>

Author: vsoch

.github/workflows/build-release.yaml

@@ -25,7 +25,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python: ["3.8", "3.9", "3.10", "3.11"]
+        python: ["3.8", "3.9", "3.10", "3.11", "3.12", "3.13"]
     container:
       image: fluxrm/testenv:jammy
     steps: