Test against stable version of python 3.13

Author: youtux

.github/workflows/main.yml

@@ -31,7 +31,7 @@ jobs:
             toxfactor: py3.12
             ignore-typecheck-outcome: true
             ignore-test-outcome: false
-          - python-version: "3.13-dev"
+          - python-version: "3.13"
             toxfactor: py3.13
             ignore-typecheck-outcome: true
             ignore-test-outcome: false