housekeeping: switch 3.13 to non-dev

Author: erikwrede

.github/workflows/tests.yml

@@ -25,7 +25,7 @@ jobs:
       fail-fast: false
       matrix:
         include:
-          - {name: '3.13', python: '3.13-dev', os: ubuntu-latest, tox: py313}
+          - {name: '3.13', python: '3.13', os: ubuntu-latest, tox: py313}
           - {name: '3.12', python: '3.12', os: ubuntu-latest, tox: py312}
           - {name: '3.11', python: '3.11', os: ubuntu-latest, tox: py311}
           - {name: '3.10', python: '3.10', os: ubuntu-latest, tox: py310}