Use 3.13-dev

Author: linuxdaemon

.github/workflows/pythonapp.yml

@@ -20,7 +20,7 @@ jobs:
         - '3.10'
         - '3.11'
         - '3.12'
-        - '3.13'
+        - '3.13-dev'
     runs-on: ubuntu-22.04
     steps:
     - uses: actions/checkout@v4