add python 3.13 runner

Author: maxkahan

.github/workflows/build.yml

@@ -24,7 +24,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python: ["3.9", "3.10", "3.11", "3.12"]
+        python: ["3.9", "3.10", "3.11", "3.12", "3.13"]
         os: ["ubuntu-latest"]
     steps:
       - name: Clone repo